Faucet and Plumbing Fixture Repair Guide

Every faucet, no matter how it looks on the outside or how its handle operates, relies on the same basic idea: some kind of internal seal opens to let water through and closes to stop it. When you turn a faucet handle to the "off" position, you're not just closing a valve in the abstract sense — you're pressing a physical component (a rubber washer, a rubber or synthetic O-ring, a sealed cartridge, or a pair of ceramic discs, depending on the faucet's design) into a seat tightly enough that water can't pass. When that seal fully closes, no water gets through. When it doesn't quite close all the way, you get a drip.

The reason faucets eventually drip isn't usually a mystery or a sign that something has gone badly wrong with your plumbing. It's simple wear. A few things typically cause a seal to stop working as well as it used to:

• Physical wear from repeated use. A rubber washer or O-ring gets compressed against a metal or ceramic seat every single time the faucet is used. Over years of daily use, that rubber gradually flattens, hardens, or develops small grooves that let water sneak past even when the handle is fully closed.
• Mineral scale buildup. Woodbridge Township's water, like most municipal water supplies, carries some level of dissolved minerals. Over time, those minerals can deposit on and around internal faucet components, which can prevent a seal from seating cleanly against its mating surface — not because the rubber or ceramic itself failed, but because grit or scale is physically holding the seal open by a hair's width.
• Small cracks or pitting. Especially in older washers, gaskets, or O-rings, age and repeated compression can cause tiny cracks that let water seep through even when the part is otherwise still doing its job in every other respect.
• A worn or scored valve seat. In compression faucets specifically, the metal seat the washer presses against can develop grooves or rough spots over time (often from an already-failing washer being run too long), which means even a brand-new washer won't seal perfectly against a damaged seat.

The practical upshot of all this is reassuring, in a way: a dripping faucet is one of the most mechanically straightforward plumbing problems there is. It's very rarely caused by anything structural, and it almost never means there's a bigger problem lurking behind the wall. It means one specific, physically small, and generally inexpensive part has done its job for years and finally needs to be replaced. The rest of this guide is essentially about how to find that part, understand which one it is, and decide whether replacing it yourself makes sense or whether it's a better use of your time to have a plumber handle it.

One more thing worth knowing upfront: not every leak involving a faucet is actually the faucet's fault. Water pooling around the base of a faucet on the counter, for example, can come from a supply line connection rather than the faucet body itself — that distinction matters for diagnosis and is covered in more detail later in this guide.

Before attempting any repair, it helps enormously to know which of the four common faucet types you're dealing with, because the internal mechanism — and therefore the repair approach — is meaningfully different between them. You generally don't need to take anything apart to figure this out; the handle configuration and how the faucet behaves as you turn it are usually enough to tell you what's inside.

Compression faucets (older two-handle style)

A compression faucet is the traditional design most people picture when they think of an older kitchen or bathroom faucet: two separate handles, one for hot and one for cold, each of which you turn multiple full rotations to open and close. The name comes from how it works — turning the handle lowers a stem that compresses a rubber washer down onto a valve seat, physically pressing the washer flat to stop water flow. Turning the handle the other way lifts the stem and lets water through.

This is the oldest and mechanically simplest of the four designs, and it's also the type most prone to eventually needing a washer replacement, simply because the washer is doing hard physical work — being compressed and released — every single time the faucet is used. If your faucet has two separate handles that each take several turns to fully open or close, and especially if it's original to an older home, it's very likely a compression faucet.

Cartridge faucets

A cartridge faucet can be either single-handle or two-handle, and instead of a simple washer-and-seat arrangement, it uses a sealed cartridge — a self-contained unit with its own internal seals — that slides or turns to control water flow and temperature. You'll typically recognize a cartridge faucet by a handle that moves smoothly with a relatively short range of motion (a partial turn or a lift-and-turn motion) rather than the many full rotations of a compression faucet.

The key practical difference for repair purposes: cartridge faucets are usually repaired by replacing the entire cartridge as a single unit, rather than disassembling it further to replace individual internal pieces. Cartridges are generally sold as matched replacement parts for specific faucet brands and models, which is worth keeping in mind if you go this route — more on finding the right one in the step-by-step section below.

Ball faucets

A ball-type faucet is a single-handle design, common in older single-handle kitchen faucets, that uses a rotating metal or plastic ball with internal chambers to control the mix and flow of hot and cold water as you move the handle. You move the handle in multiple directions — up and down for flow, side to side for temperature — and that motion rotates the ball to align its internal openings with the water inlets.

Ball faucets tend to have more individual small parts involved in a repair than cartridge faucets do — springs, seats, and O-rings around the ball itself — which can make them a slightly more involved DIY repair, though still very manageable with a repair kit matched to the faucet.

Ceramic disc faucets

Ceramic disc faucets are a newer, generally more durable design, often found in higher-end or more recently installed single-handle faucets. Instead of rubber washers or a ball mechanism, they use two closely fitted ceramic discs that rotate against each other inside a cylinder to control water flow — the discs have matching openings that align or misalign as the handle moves.

Because ceramic is much harder and more wear-resistant than rubber, this design is generally longer-lasting and less prone to dripping than the older designs above. When a ceramic disc faucet does eventually leak, it's more often the O-rings surrounding the disc cylinder than the discs themselves, though the cylinder assembly can also wear out after many years of use.

A quick way to narrow it down without taking anything apart

If you're not sure which type you have, a few quick observations usually get you there: two separate handles that each take several full turns almost always means a compression faucet. A single handle that moves smoothly through a short range of motion, lifting and turning, suggests either a cartridge or ball design — ball faucets are more common in older single-handle kitchen faucets specifically, while cartridge designs show up across kitchen and bathroom faucets of many ages. A single-handle faucet that feels notably smooth and precise, especially on a more recently purchased or higher-end fixture, is a reasonable candidate for a ceramic disc design. If you're still unsure once the handle is off (covered in the next section), the internal component itself — a flat rubber washer and stem, a compact sealed cartridge, a metal ball with a slotted cap, or a wide flat cylinder — will generally confirm which type you're working with.

Most basic faucet repairs don't require specialized plumbing tools — a small, general kit is usually enough for a compression washer swap, a cartridge replacement, or an aerator cleaning. Having everything on hand before you start also means you're not mid-repair, with the water off and the sink apart, hunting for a tool.

• Adjustable wrench or a small set of open-end wrenches, for supply line connections and some faucet-specific nuts.
• A set of screwdrivers (flathead and Phillips), since handle set screws vary by faucet brand.
• An Allen key set (hex keys) — many single-handle faucets use a small hex set screw hidden under a decorative cap on top of or behind the handle.
• Needle-nose pliers, useful for gripping and removing small internal parts without scratching visible faucet surfaces.
• A flat, thin tool for prying off decorative caps — a small flathead screwdriver wrapped in tape (to avoid scratching the finish) or a purpose-made cap-removal tool works well.
• Plumber's grease (silicone-based), for lubricating new O-rings and seals on reassembly, which helps them seat properly and extends their working life.
• A small container or magnetic tray to keep tiny screws and parts from rolling away or getting lost down the drain — this matters more than it sounds like it would.
• A rag or towel and a small bucket, since some water will drain out of the supply lines and faucet body even after the shutoff valves are closed.
• The replacement part itself — a washer kit, an O-ring kit, or a cartridge matched to your faucet's brand and model, ideally purchased after you've identified the faucet type and, where possible, the model.

On that last point: if you can find a model number on the faucet itself (sometimes printed on the underside of the spout, on the cartridge itself once removed, or in paperwork if you kept it from installation), bringing that information with you — or a photo of the removed part — to a hardware or plumbing supply store makes it far more likely you'll come home with the right replacement kit on the first trip. Many faucet manufacturers also sell repair kits specifically matched to their own product lines, which is generally the most reliable way to get a properly fitting part rather than a generic universal one.

The general sequence below applies across most faucet types, with a few notes on where the process diverges depending on whether you're working with a compression, cartridge, ball, or ceramic disc faucet.

1. Shut off the water at the fixture's own supply valves. Look under the sink for two small valves (sometimes called angle stops or shutoff valves) — one for hot, one for cold — connected to the faucet by flexible supply lines. Turn both clockwise until they stop. This is different from, and more targeted than, turning off your home's main water supply, and it's the correct first step for a faucet repair specifically. If these valves are old, stiff, or you're not confident they're actually shutting off flow, turn on the faucet afterward to confirm water stops — if it doesn't fully stop, the valves themselves may be worn out, which is worth knowing before you go further (and is a reasonable moment to consider calling a plumber, since a shutoff valve that won't fully close can complicate the rest of the repair).
2. Open the faucet and let remaining water drain out. With the supply valves closed, turn the faucet handle to the open position to release pressure and let any water still in the lines drain into the sink. Keep a rag or small bucket handy for what drips out as you disassemble things.
3. Remove the handle. This step varies the most by faucet brand and design, but generally involves one of two things: a visible screw (sometimes under a small decorative cap that pries off with a flathead screwdriver) or a set screw hidden underneath the handle itself, often accessed with a small Allen key. Once the screw is out, the handle should lift or pull off — if it's stuck from mineral buildup or age, gentle wiggling usually works better than force; a specialized handle puller is available for stubborn cases, but that's rarely needed for a typical residential faucet.
4. Access the internal component. With the handle off, you'll typically see either a retaining nut (compression faucets) or a retaining clip or nut holding the cartridge or ball assembly in place. Remove this with the appropriate wrench or pliers, keeping track of the order everything comes out in — taking a photo with your phone before removing anything is a simple way to make reassembly easier.
5. Identify and remove the worn part. For a compression faucet, this means removing the stem and finding the rubber washer at its base, held on by a small screw. For a cartridge faucet, the entire cartridge typically pulls straight out once its retaining clip or nut is removed. For a ball faucet, the ball itself lifts out along with its surrounding springs and seats. For a ceramic disc faucet, the disc cylinder assembly lifts out as a unit.
6. Take the old part with you (or note the model) when buying a replacement, if you haven't already sourced one. Matching the exact washer size, O-ring dimensions, or cartridge model matters — a slightly wrong-sized part may seem to fit but won't seal properly.
7. Inspect the valve seat and surrounding area while things are open. Look for visible pitting, grooves, or mineral buildup on the seat itself. A light coating of mineral scale can often be cleaned off with a soft brush or a vinegar-soaked cloth; a deeply grooved or damaged seat is a sign that a washer alone may not solve the drip and that a seat replacement, a full cartridge swap, or professional attention may be the better path.
8. Install the new part. Apply a thin layer of plumber's grease to new O-rings or seals before installing, which helps them seat correctly and reduces wear going forward. Make sure the new washer, cartridge, or disc assembly is oriented correctly — many cartridges are designed to fit only one way, but it's still worth double-checking against how the old one came out.
9. Reassemble in reverse order. Retaining nut or clip back in place, handle back on, set screw or decorative cap replaced.
10. Turn the supply valves back on slowly rather than fully open all at once, which reduces the sudden pressure surge into a system that's had air introduced during the repair.
11. Test thoroughly. Run the faucet through hot and cold, check for drips at the spout with the handle fully closed, and check around the handle base and under the sink at the connections you touched for any sign of a new leak. Let it sit for a few minutes and check again — a slow drip sometimes doesn't show up in the first thirty seconds.

If, after completing this process, the faucet still drips — or drips again within a few days — that's a meaningful signal rather than something to just repeat the same fix on. It generally means either the wrong part was installed, the valve seat itself is damaged beyond what a new washer can compensate for, or there's a second worn component you haven't addressed yet. At that point, a full cartridge or faucet replacement, or a call to a plumber, is usually the more productive next step than a second attempt at the same repair.

Not every faucet repair should end with putting the old faucet back together with one new part. There are a couple of situations where stepping up to a fuller replacement — either of the cartridge or the entire faucet — is often the more sensible choice.

Swapping the whole cartridge instead of individual internal pieces

For cartridge-style faucets specifically, it's often more practical to replace the entire cartridge as a sealed unit rather than trying to open it up and replace individual O-rings or seals inside it. Most cartridges aren't really designed to be serviced piece by piece — they're built and sold as a single assembly, and a full replacement cartridge, correctly matched to your faucet's brand and model, is usually just as affordable and considerably more reliable than attempting to repair the internals of the old one. If you've identified a cartridge faucet and found the worn seal, buying a full replacement cartridge is generally the more sensible default rather than the exception.

When a faucet has had multiple repeat issues

If a faucet has needed more than one repair over a relatively short span — a washer last year, now a cartridge, or a base leak that keeps coming back despite fresh O-rings — that pattern is worth paying attention to on its own. An aging faucet with multiple worn components isn't unusual, and at a certain point, continuing to replace individual parts on a unit that's simply reached the end of its practical service life can end up costing more in time and repeated parts than replacing the faucet outright would. This is a judgment call that depends on the faucet's age, how many separate issues it's had, and how much you value not thinking about it again for a while — there's no fixed rule for exactly when replacement becomes the better option, but a pattern of repeat visits to the same faucet is a reasonable point to start weighing it seriously rather than automatically reaching for one more small repair.

Fixture age as a general factor

A faucet's age alone isn't a perfect predictor of whether it's worth repairing versus replacing, but it's a reasonable input. A faucet that's a few years old with one worn part is an easy call — repair it. A faucet original to a home built decades ago, especially if parts are becoming difficult to source because the model has been discontinued, tips the calculation toward replacement, since finding a correctly matched washer or cartridge can become genuinely difficult (or require settling for a generic part that doesn't seal quite as well) as a faucet ages out of production. If you're finding it hard to identify or locate the right replacement part for your specific faucet, that difficulty itself is useful information about whether replacement might be the more practical route.

Where the water shows up matters. A leak around the handle, a drip at the tip of the spout, and water pooling at the base of the faucet on the counter usually point to different underlying causes — and knowing which one you're dealing with helps target the repair instead of guessing.

The practical value of this distinction is that it can save you from taking apart the wrong part of the faucet. If water is pooling at the base while the spout itself stays dry when off, disassembling the internal cartridge or washer mechanism won't fix anything — the problem is at the connection or the base gasket, not the water-stopping mechanism inside. Spending a few minutes running the faucet and watching closely for exactly where water first appears is worth doing before starting any repair.

A common and often misdiagnosed issue is noticeably weaker water flow at one specific faucet while every other fixture in the house seems normal. It's easy to assume this means a broader plumbing problem, but in the large majority of cases, it's something much simpler and entirely local to that one fixture: a clogged aerator.

What an aerator is and why it clogs

The aerator is the small mesh screen fitting screwed onto the very tip of a faucet spout. Its job is to mix air into the water stream, which reduces splashing and makes the flow feel fuller while actually using less water. Because it's a fine mesh screen sitting directly in the path of every drop of water that leaves the faucet, it's also the first thing to catch mineral sediment, tiny bits of debris from the water supply, or scale buildup over time. As that debris accumulates, it physically restricts how much water can pass through, which shows up as reduced pressure or flow at that one faucet specifically.

How to check and clean an aerator

1. Unscrew the aerator from the tip of the spout, usually by hand or with gentle use of pliers wrapped in a cloth to avoid scratching the finish (aerators typically unscrew counterclockwise).
2. Take note of how the internal pieces are stacked as you disassemble it — most aerators have a screen, a flow restrictor disc, and a rubber washer in a specific order, and reassembling them out of order can affect flow or cause a small leak at the spout tip.
3. Rinse the mesh screen under running water and use an old toothbrush or a straightened paperclip to clear out visible debris and mineral deposits from the mesh.
4. For stubborn mineral buildup, soaking the aerator parts in a small container of white vinegar for 15 to 30 minutes usually dissolves scale that a simple rinse won't remove — plain water alone often isn't enough once mineral deposits have hardened.
5. Reassemble in the same order the pieces came out and screw the aerator back onto the spout, snug but not overtightened.
6. Run the faucet and check whether flow and pressure are back to normal.

Why one affected faucet points away from a house-wide issue

This distinction is genuinely useful for narrowing down the cause without needing to call anyone. If low pressure shows up at multiple fixtures throughout the house at the same time, that's a different situation — potentially related to the municipal supply, a main shutoff valve that isn't fully open, or a more significant issue with the home's plumbing — and is covered in more general terms elsewhere on this site. But when it's isolated to a single faucet while everything else in the house runs normally, the aerator (or, less commonly, a clogged supply line specific to that fixture) is by far the most likely explanation, and cleaning the aerator is a safe, simple, and free first step before assuming anything more serious is going on.

Outdoor faucets — hose bibs, spigots, sillcocks, whatever you call them around your house — work on the same basic principle as an indoor compression faucet, but they live in a much harsher environment: constant exposure to weather, more infrequent use than an indoor faucet, and in this region, real freeze risk for several months of the year.

Two issues account for most outdoor hose bib problems. The first is a worn washer, exactly as with an indoor compression faucet — the same wear mechanism applies, just accelerated somewhat by outdoor exposure and inconsistent use. A hose bib that drips from the spout when closed, or leaks around the handle when open, is very often a straightforward washer or packing replacement, using the same general approach described in the step-by-step section above (with the water shut off at the interior shutoff valve for that line, if your home has one, or the main supply if not).

The second, and more serious, is freeze damage. A hose bib that wasn't properly disconnected from a garden hose and drained before winter, or one on a home without an interior shutoff for that line, is genuinely vulnerable to freezing — and a spigot that's frozen and cracked internally may not show obvious damage until it's turned on again and water leaks from a split section, sometimes inside the wall where the supply line passes through rather than visibly outside. We cover the mechanics of freeze damage, how to tell a frost-free sillcock from a standard hose bib, and the full winterization steps that prevent this in detail in our burst pipe prevention guide — rather than repeat that content here, the short version for this guide is: disconnect hoses before the first hard freeze every year, and if a hose bib has been left connected through a cold snap, treat any subsequent leak as a possible freeze-related crack rather than assuming it's simply a routine washer issue.

If a spigot leaks specifically after a cold winter, especially if it wasn't drained properly beforehand, it's worth having it checked before simply replacing a washer and moving on — a cracked interior section sometimes only becomes obvious once water pressure is restored and finds the actual break point, which may be inside the wall rather than at the visible spigot itself.

Shower and tub valves work on the same underlying principles as sink faucets — compression, cartridge, ball, or ceramic disc mechanisms all show up in shower and tub hardware too — but they're generally a more involved repair for one structural reason: the valve body itself is usually mounted inside the wall, with only the handle, trim plate, and spout visible from inside the shower or tub.

This matters practically in a few ways. First, accessing the valve for repair often requires removing the handle and trim plate from the wall, which on many modern showers reveals the cartridge or valve stem without needing to open the wall itself — many tub/shower valves are designed with this kind of front access specifically so a cartridge can be serviced without cutting into drywall or tile. Second, shutting off water to a shower valve for repair sometimes isn't as simple as a pair of valves under a sink; some homes have dedicated shutoffs for shower lines, often in a basement or an access panel behind the shower wall, while others require shutting off the home's main supply for anything beyond the simplest fix.

A dripping showerhead or a tub spout that continues to run after the valve is closed follows the same general diagnostic logic as a sink faucet: a worn cartridge or washer inside the valve body is the most likely cause. Replacing a shower cartridge, once accessed, is mechanically similar to replacing a sink faucet cartridge — remove the trim, access the cartridge, pull the retaining clip, swap the cartridge, reassemble. Many homeowners handle straightforward shower cartridge replacements themselves once they've confirmed the access panel or front-access design, though the reduced visibility and working space compared to an open sink cabinet makes this a step up in difficulty from a basic sink faucet repair.

Where shower and tub valve repairs cross into territory better suited for a plumber: if there's no obvious front-access panel and the valve appears to require opening the wall to reach, if the shutoff situation is unclear or the only option is shutting off the entire home's water, or if a leak appears to be coming from inside the wall itself rather than from the visible fixture — a stain spreading on a ceiling below a second-floor bathroom, for example, or dampness in an adjacent wall — those situations call for more than a basic cartridge swap and are covered further in the "when to call a professional" section below.

A slow-draining bathroom sink is one of the most common plumbing complaints homeowners bring up, and it's often assumed to be a clog somewhere down the drain line. Sometimes that's true — but a genuinely common and easy-to-overlook alternative cause is the pop-up drain assembly itself, which is a fixture-level mechanism rather than a true clog in the pipe.

A pop-up drain assembly is the stopper mechanism built into most bathroom sinks — the small lever behind the faucet (or, on some newer designs, a twist-and-lift knob on the stopper itself) that raises and lowers a stopper to hold or release water in the sink basin. It's connected by a small rod-and-clip linkage running from the lever, down behind the faucet, to a horizontal pivot rod that passes through the drain body and connects to the stopper below.

Over time, this stopper mechanism accumulates the same things a shower drain does — hair, soap scum, and general debris — right around the stopper itself, at the point where it sits inside the drain opening. Because this buildup happens right at the stopper, close to the surface, it can significantly slow drainage even when the pipe further down is completely clear. It's also common for the linkage itself to fall slightly out of adjustment over time, causing the stopper to not lift as high as it should, which restricts water flow even without any buildup at all.

This is a genuinely useful distinction for a homeowner to make before assuming a slow bathroom sink needs drain cleaning or snaking: if you remove and clean the stopper assembly and the drain suddenly runs freely, the "clog" was never really down in the pipe at all — it was the fixture mechanism. Most pop-up stoppers can be removed for cleaning by turning and pulling the stopper itself (many modern designs simply twist counterclockwise and lift out), or by disconnecting the pivot rod from underneath the sink for older or more secure designs. Cleaning off the accumulated hair and residue, checking that the linkage still allows the stopper to lift fully, and reassembling is usually enough to restore normal drainage — and it's a simpler and less invasive first step than reaching for a drain snake or chemical drain cleaner.

If cleaning the stopper assembly doesn't resolve slow drainage, that's a reasonable point to move on to checking for an actual clog further down the line — see our guide on toilet repair and related fixture issues, or reach out through our request service page if the slow drain persists after checking the stopper.

A basic faucet repair is genuinely approachable for most homeowners, but a few recurring mistakes tend to turn a simple fix into a bigger headache. Knowing them ahead of time helps you avoid repeating them.

• Not shutting off water at the fixture's own valves first. Turning off just the faucet handle (which, remember, is the thing that's already failing to seal) doesn't stop water from reaching the internal components you're about to open up. Always use the dedicated shutoff valves under the sink.
• Overtightening on reassembly. It's tempting to crank retaining nuts and connections down as tight as possible "to be safe," but overtightening can crack plastic components, damage new O-rings before they've even been used, or strip threads — snug and secure is the goal, not maximally tight.
• Losing track of small parts or their order. Faucet internals often have a specific stacking order for washers, springs, and seats. Taking a photo before disassembly, or laying parts out in the order removed, prevents a frustrating reassembly guessing game later.
• Buying a generic replacement part instead of a matched one. A washer or O-ring that's close enough in size but not exact can seem to work initially and then fail again quickly, or never fully stop the drip in the first place. Matching by brand and model, or bringing the old part to compare, meaningfully improves the odds of a lasting fix.
• Forcing a stuck or corroded part. Applying real force to a seized retaining nut or corroded fitting risks snapping something off, at which point a simple repair becomes a more complicated one involving a broken component. If something won't move with reasonable effort, that's a sign to stop and consider professional help rather than pushing harder.
• Skipping the test-and-wait step. Testing immediately after reassembly and declaring the job done can miss a slow drip that only becomes apparent after a few minutes of settling. Give it a proper test before considering the repair finished.
• Repeating the same fix after it doesn't work. If a drip persists after a repair attempt, reinstalling the same type of part again rather than reconsidering the diagnosis (a damaged valve seat, the wrong part, or a second worn component) usually just wastes another part and another round of your time.

Plenty of faucet and fixture repairs are reasonable DIY territory for a homeowner with basic tools and some patience — replacing a washer, swapping a cartridge, or cleaning an aerator all fall comfortably into that category for most people. But there are specific situations where calling a plumber is the more sensible choice, not because the repair itself is impossible for a homeowner, but because the risk of making things worse outweighs the savings of doing it yourself.

Generally reasonable to handle yourself

• Replacing a compression faucet washer
• Swapping a cartridge in a sink faucet, once you've correctly identified and sourced the matched part
• Cleaning or replacing an aerator
• Cleaning a pop-up drain stopper assembly
• Basic outdoor hose bib washer replacement, assuming no sign of freeze damage
• Replacing worn O-rings on an accessible faucet base or spout swivel joint

Good reasons to call a plumber instead

• A persistent leak after a genuine DIY repair attempt. If you've correctly identified the faucet type, sourced a matched part, and replaced it, but the leak continues or returns quickly, something beyond a simple worn part is likely going on — a damaged valve seat, a deeper issue with the faucet body, or a misdiagnosis of where the leak is actually coming from.
• Corroded or seized fittings that won't move safely. Forcing a stuck connection risks snapping a supply line, cracking a fitting, or damaging threads, turning a contained repair into a bigger one — sometimes with water actively spraying while you're mid-repair.
• A leak that appears to be coming from inside a wall — behind a shower valve, for instance, or around a supply line that runs through a finished wall to reach a fixture. Water damage inside a wall isn't always visible until it's already significant, and this is not a situation to diagnose or repair by guesswork.
• Uncertainty about shutting off water safely — whether that's not being able to identify or reach the fixture's shutoff valves, or a shutoff valve itself appearing stuck, corroded, or unreliable. Attempting a repair without confidence in your ability to fully stop water flow risks a much bigger mess than the original drip.
• A full fixture replacement where the existing shutoff valves or supply lines are old, seized, or of uncertain condition. Replacing a faucet is more approachable than it sounds when everything underneath is in good working order — it's a different situation when the connections themselves are the weak point.
• Any situation where you've opened something up and aren't confident about what you're looking at. There's no downside to stopping, turning the water back on if possible, and calling a plumber to finish or take over a repair that's gotten more complicated than expected.

None of this is about discouraging reasonable DIY work — a huge share of faucet repairs are entirely within reach for a comfortable homeowner. It's about recognizing the specific situations where the cost of a failed DIY attempt (water damage, a more expensive follow-up repair, a fixture that's now harder to work on because a part broke during removal) outweighs whatever was saved by not calling a plumber in the first place. If you're in Woodbridge Township and want a second opinion before deciding, our faucet and fixture repair service page has more on what a professional visit typically involves, or you can reach out through our request service page directly.

When a faucet or fixture is being fully replaced rather than repaired — either because it's reached the end of its practical life or because you're upgrading as part of a kitchen or bathroom update — a professional plumbing fixture installation generally follows a consistent sequence, whether it's a kitchen faucet, a bathroom sink faucet, or another fixture entirely.

1. Removing the old fixture. This includes disconnecting supply lines, removing mounting hardware (often accessed from underneath the sink, which can be a tight and awkward space), and lifting the old faucet or fixture free.
2. Checking the condition of supply lines and shutoff valves. This step is worth calling out specifically, because it's one that's easy to skip and often shouldn't be. Old shutoff valves — the small valves under a sink that control water to that specific fixture — are a common thing worth having assessed while a fixture is already being replaced and the area is already opened up. A valve that hasn't been operated in years can seize, develop a slow leak once it's turned, or simply fail to fully shut off water when needed later. Since the area is already accessible during a fixture replacement, it's a sensible time to have a plumber check whether these valves are still in good working condition, rather than leaving an aging valve untouched and hoping it holds up until the next time it's needed.
3. Preparing the mounting surface, including confirming the new fixture's mounting configuration matches the existing sink holes (more on this in the next section) and cleaning the area of old sealant, mineral residue, or corrosion before the new fixture goes in.
4. Installing the new fixture and securing it according to the manufacturer's mounting hardware.
5. Connecting supply lines, using new flexible supply lines in most cases rather than reusing old ones, since supply lines are a relatively low-cost item and reusing an aged line on a newly installed fixture is generally not worth the small savings against the risk of a connection failure later.
6. Testing for leaks and proper function — running hot and cold water, checking every connection point for even a slow drip, confirming the flow and any additional features (sprayer function, temperature control, water filtration hookup if applicable) work as expected before considering the job complete.

For a straightforward like-for-like faucet swap with sound existing supply lines and shutoff valves, this is typically a relatively contained visit. It becomes a longer or more involved job when the existing valves need replacement, the new fixture's mounting configuration doesn't match the old one and requires additional sink modification, or the supply lines themselves show signs of corrosion or age that make simply reconnecting them to a new fixture an unwise choice.

If you've decided replacement makes more sense than continued repair, a few general considerations are worth thinking through before you buy — not as an endorsement of any particular brand or product, but as the practical factors that tend to matter most for how a faucet performs and holds up over time.

Finish and material durability

Faucet finishes vary widely in how well they hold up to daily use, cleaning products, and water mineral content. Chrome remains among the most durable and easiest to maintain finishes for most households. Brushed and matte finishes tend to show water spots and fingerprints less than polished ones, though this varies by specific product line. Beyond the visible finish, the faucet's underlying construction — solid brass body construction is generally considered more durable over the long run than faucets built primarily from lower-cost plastics or composite materials, though this often correlates with price point.

Single-hole vs. widespread mounting: match your existing sink

This is one of the most practically important things to check before purchasing, because it directly determines whether a new faucet will fit your existing sink without additional modification. A single-hole faucet mounts through one hole in the sink or countertop, with the handle(s) built into the same unit as the spout. A widespread (or "spread-fit") faucet has separate hot and cold handles that mount through their own separate holes, connected to a central spout by flexible hoses underneath. Some faucets are designed to work across a small range of hole spacings, but not all are, and buying a widespread faucet for a sink that only has a single mounting hole (or vice versa) means either returning the fixture or taking on additional countertop or sink modification work you likely didn't plan for. Counting your existing sink's mounting holes and measuring their spacing before shopping avoids this entirely.

Water-efficient and WaterSense-certified options

For anyone replacing a kitchen or bathroom faucet, it's worth knowing that the EPA's WaterSense program certifies bathroom faucets that meet specific water-efficiency and performance criteria — a WaterSense label on a bathroom faucet indicates it's been independently certified to use less water than a standard fixture while still meeting minimum flow performance expectations. This is a reasonable thing to look for if reducing water use is a priority, though it's worth noting WaterSense certification currently applies to bathroom faucets specifically rather than kitchen faucets, where flow needs (filling pots, rinsing dishes) are generally higher.

It's easy to put off fixing a faucet that's "just dripping a little" — it's not an emergency, it doesn't stop you from using the sink, and a slow drip can feel more like a minor annoyance than an actual problem worth prioritizing. Two things are worth knowing that change that calculus somewhat.

The first is that a slow drip adds up to far more wasted water than it looks like it does. According to the EPA's WaterSense program, a faucet dripping at a rate of just one drip per second can waste more than 3,000 gallons of water in a year — and the EPA estimates that the average household's leaks overall (faucets included, among other fixture types) can account for more than 9,300 gallons of water wasted annually. That's not a dramatic flood-level problem, but it's a genuinely meaningful amount of water — and cost, since that water is still being paid for on your water bill — accumulating quietly in the background for as long as the drip goes unaddressed.

The second is that a drip is often an early signal rather than the full extent of the problem. The internal seal that's letting a small amount of water through when fully closed is the same seal responsible for stopping water flow entirely. A washer or cartridge that's worn enough to cause a slow drip today is generally further along the same wear process that, left unaddressed, can eventually lead to a more significant failure — a seal that fails more completely, a valve that becomes difficult to fully shut off, or in less common cases, a fitting or connection that gives way under continued strain from a mechanism that isn't sealing correctly. None of this means every dripping faucet is on the verge of a major failure, but it does mean a small drip is a reasonable thing to address in the near term rather than a truly indefinite deferral, both for the cumulative water cost and because it tends to be one of the easiest and least expensive plumbing repairs to make while it's still just a drip.

A quick-reference summary of the issues covered throughout this guide, organized by symptom:

A few things specific to Woodbridge Township are worth keeping in mind when it comes to faucet and fixture repair:

• Housing age varies significantly by section. Homes across Woodbridge, Avenel, Colonia, Iselin, Fords, Port Reading, and Sewaren span many decades of construction, and older homes are more likely to still have original kitchen and bathroom faucets — often compression-style two-handle designs — along with original, aging shutoff valves that have rarely if ever been operated. If you're having any fixture repaired, it's worth mentioning the home's approximate age to your plumber, and worth having those original shutoff valves checked while a plumber is already there, given how common it is for a valve that's decades old to seize or fail once it's actually used after years of sitting untouched.
• Outdoor hose bib winterization is especially relevant given the region's cold-weather freeze risk. Woodbridge Township sees a real winter freeze season, and outdoor spigots left connected to a hose or otherwise unprepared for a hard freeze are a recurring source of both minor leaks and, in worse cases, more significant burst-pipe damage. Our burst pipe prevention guide covers the full winterization checklist in detail — disconnecting hoses, identifying frost-free versus standard hose bibs, and what to do ahead of a hard freeze — and is worth reviewing each fall regardless of whether you're currently dealing with a hose bib issue.
• Township water mineral content contributes to mineral scale buildup in fixtures over time. Like most municipal water supplies, some level of dissolved minerals in the water contributes gradually to scale buildup on aerators, valve seats, and other internal faucet components — one more reason periodic aerator cleaning is a genuinely useful low-effort habit rather than something to only do once flow noticeably drops. If you're dealing with mineral buildup across multiple fixtures throughout your home rather than just one, that's a pattern worth discussing with a plumber, and our water filtration systems page has more on options for addressing water quality at the household level.
• Permits generally aren't required for straightforward fixture repair or like-for-like replacement, though this can vary depending on the specific scope of work — a larger renovation involving new plumbing runs is a different situation than a direct faucet swap. If you're ever unsure whether a specific project requires a permit, Woodbridge Township's Building Department is the right place to confirm before work begins.