How to Fix a Leaky Faucet: DIY Steps + When to Call a Pro

A faucet dripping every second wastes real water, and in Peoria that drip fails faster than the DIY guides admit. Here is the honest version: most leaks are a $6 washer or a $25 cartridge you can swap yourself in under an hour. But a few are not, and the difference is whether the valve seat under the handle is still smooth or already pitted from calcium scale. Get that call wrong and a five-minute fix becomes a flooded vanity. This walkthrough shows you how to do the easy fix right, and exactly where to stop. Max Plumbing LLC is a family-owned, licensed shop (AZ License #345009) serving Peoria and the West Valley, and if you hit the wall on any step, (480) 353-8080 reaches us.

Why is my faucet dripping in the first place?

A faucet drips because one small part inside it stopped sealing. That is almost always a worn rubber washer, a cracked O-ring, or a spent cartridge. In the West Valley there is a second culprit stacked on top: Arizona's hard water lays down calcium and magnesium scale inside the valve body, and that scale chews through cartridges years faster than the manufacturer rating suggests.

Before you touch a wrench, figure out which of the four faucet types you have, because the repair is different for each. Match yours to this list.

Compression faucet. Two separate handles, and each tightens down when you close it. Oldest design. The fix is a rubber washer at the bottom of the stem.
Cartridge faucet. One or two handles that move smoothly with no tightening feel. The fix is a replacement cartridge.
Ball faucet. A single handle that pivots over a rounded cap, common on older kitchen sinks. The fix is a ball-and-spring kit.
Ceramic-disc faucet. A single lever over a wide cylindrical body. Durable, but the seals and the disc cartridge can still fail.

How to fix a leaky faucet, step by step

Here is the sequence we follow on the truck, trimmed to what a homeowner can safely do. Read it through once before you start so nothing surprises you halfway in.

Shut off the water at the angle stop. Look under the sink for the small oval or football-shaped valves on the supply lines. Turn them clockwise until they stop. If a home does not have stops, or the stop is frozen with scale and will not turn, that is your first sign to call. Never force a corroded stop.
Open the faucet and drain the line. Run the tap until it stops dripping. This confirms the water is truly off and relieves any pressure still in the line.
Plug the drain. Drop in the stopper or lay a rag over the opening. Small screws and springs love to vanish down an open drain.
Remove the handle. Pop the decorative cap, back out the screw underneath, and lift the handle off. Take a photo before and after each step so reassembly is guesswork-free.
Pull the worn part. On a compression faucet, unscrew the stem and swap the washer at the bottom. On a cartridge faucet, pull the retaining clip and slide the old cartridge straight out. Bring the old part to the hardware store and match it exactly.
Inspect the valve seat. This is the step the internet skips and the one that matters most here. Shine a light down into the body where the washer or cartridge sat. It should look smooth. If it is rough, crusty, or pitted, stop reading and skip to the next section.
Reassemble and test. Reverse your photos. Turn the angle stops back on slowly, run the faucet, and watch for seeps at the handle and base for a full minute before you call it done.

The whole job is honest work with basic tools. The only part that separates a clean fix from a callback is whether you checked the valve seat before you buttoned it up.

How to fix a leaky bathtub faucet

A leaky bathtub or shower faucet follows the same logic, with one added wrinkle: the valve lives behind the wall, so access is tighter and a mistake is wetter. Most single-handle tub and shower faucets are cartridge-style. Shut off the water (many showers have no local stop, so you may need the main), pry off the handle, remove the trim plate and retaining clip, and pull the cartridge straight out with pliers. Match the replacement to your brand and slide the new one in the same orientation.

The trap on tub and shower work is that the cartridge is often scaled in place. Yank too hard and you can crack the plastic valve body inside a finished tile wall, which turns a repair into a wall-opening job. If the cartridge will not budge with steady hand pressure, that is the stopping point.

When to call a plumber for a leaky faucet

Here is the gate, stated plainly, because getting it wrong is expensive. A DIY faucet fix is the right call when the part is isolated and the valve seat is still smooth. It becomes the wrong call the moment the metal underneath is compromised. Stop and call a pro if any of these is true.

The valve seat is pitted or corroded. No new washer or cartridge seals against rough metal. This is the single most common reason a DIY fix drips again in a week.
The stem or valve body is corroded or the cartridge will not pull free with reasonable force.
You have already replaced the cartridge once or twice and it still leaks. The body itself is scaled past sealing.
The angle stop is frozen or you cannot get the water off.
You see water pooling behind the handle or under the base, which points to a supply or body leak, not a washer.

At that point you are past a repair and into a professional faucet and cartridge replacement, and forcing it yourself is how a slow drip becomes a flooded cabinet. We would rather talk you through a $6 washer swap on the phone than pump out your vanity. When the fix is genuinely beyond a part, call (480) 353-8080 and we will diagnose it, quote it flat, and only replace what actually needs replacing. Prefer to skip the call? Request a free estimate and tell us what you are seeing.

Give the small stuff a shot first

Most leaky faucets really are a homeowner fix, and we mean that. Try the washer or cartridge. Check the valve seat. If it is smooth, you saved yourself a service call, and that is a good outcome we are happy to see. If it is pitted, corroded, or you have already been down this road once, that is when a licensed plumber earns the call. Max Plumbing LLC is family-owned, licensed under AZ #345009, and we handle everything from a single faucet to small plumbing repairs across Peoria and the greater Phoenix Valley. We answer the phone 24/7. Call (480) 353-8080 when you need us.