Dripping Faucet Repair — Ball, Cartridge, Ceramic Disc & Compression Fix Guide
One drip per second from a faucet wastes approximately 3,000 gallons per year — adding $15–25 to your annual water bill, and that's just one faucet. The #1 mistake homeowners make is buying the wrong repair kit because they don't identify the faucet type first. There are four types — compression, ball, cartridge, and ceramic disc — and each requires a completely different repair approach and different parts. This guide identifies your faucet type, then walks through the exact procedure for each. Most repairs take 30–60 minutes and cost $5–40 in parts. Shut off the water at the angle stop valves under the sink (turn clockwise until they stop) before starting any faucet repair, or use the main house shutoff if the angle stops are old or stiff.
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Common Symptoms
- Faucet drips from the spout when handle is fully off
- Water seeps out around the base of the handle
- Faucet requires more force to fully stop the flow over time
- Dripping gets worse after hard water deposits build up
- Single-handle faucet drips even when moved to the fully-off position
Most Likely Causes
- 1
Worn Seat Washer or O-Ring — Compression Faucet
Compression faucets are the oldest type and use a rubber seat washer that presses down against a metal seat to stop water. With every use, the washer wears against the seat. Over time, the washer hardens, flattens, or tears, and the seat develops pitting from the metal-on-rubber contact. When either surface degrades, water seeps past. Replacement washers: Danco 88369 (assorted sizes) or Ace 44396 (full assortment kit). If the seat itself is pitted, a seat wrench and seat grinder tool can resurface it — otherwise install a replacement seat. These faucets have two separate handles for hot and cold that screw all the way down to close.
- 2
Worn Cam, Ball, Seats, Springs, or O-Rings — Ball Faucet
Ball faucets have a single handle that rotates over a rounded dome — the handle controls a slotted ball that aligns with inlet ports to mix hot and cold water. Delta faucets are the most common ball-style. Inside, there are two rubber seats, two springs, a cam assembly, the ball itself, and multiple O-rings on the body. Any of these can wear and cause dripping — but because they all interact, attempting to replace just one worn part rarely fixes the leak permanently. The correct repair: replace the entire kit. Delta RP3614 repair kit includes cam, ball, seats, springs, and all O-rings. Moen uses a cartridge mechanism in its single-handle faucets rather than a true ball valve, despite the similar appearance.
- 3
Worn Cartridge — Cartridge Faucet
Cartridge faucets use a ceramic or plastic cartridge that slides up and down (or rotates) inside the faucet body to control water flow and temperature. They can be single-handle or two-handle. When the cartridge seals wear, water bypasses them and drips from the spout. Part numbers matter: Moen 1225 (two-handle), Moen 1255 (single-handle), Price Pfister/Pfister 974-042, Delta RP19804. Replacement is straightforward — pull the old cartridge straight out and insert the new one in the exact same orientation. Inserting the cartridge rotated 180 degrees reverses hot and cold.
- 4
Mineral Deposits on Ceramic Disc — Ceramic Disc Faucet
Ceramic disc faucets have a single lever on a wide, cylindrical body — the mechanism uses two ceramic discs that rotate against each other to control flow. These are extremely durable and rarely fail from mechanical wear. Most drips in ceramic disc faucets are caused by mineral deposits (calcium/limescale) on the disc faces preventing a full seal — not a cracked or failed disc. Cleaning the disc cylinder with white vinegar resolves the majority of ceramic disc drips without any parts replacement. If the disc is cracked (visible fracture on the ceramic surface), replacement is required: Kohler GP30509 disc cylinder, American Standard M952247-0070A.
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Quick DIY Checks
Never overtighten packing nuts, cartridge retaining nuts, or valve body components. Over-tightening cracks ceramic valve bodies, deforms brass fittings, and strips threads — damage that requires replacing the entire faucet. Hand-tighten plus 1/8 to 1/4 turn with a wrench is sufficient for most faucet components.
Document the hot and cold orientation before pulling a cartridge. Photograph the cartridge from above before removal so you can see which direction the ears face. Installing a Moen or Pfister cartridge rotated 180 degrees reverses hot and cold completely — a common and frustrating mistake that requires disassembly to correct.
- 1Step 1 — identify your faucet type before buying any parts: Compression — two separate handles (one hot, one cold) that screw all the way down when turned fully off; oldest style, found in homes pre-1980s. Ball — single handle that rotates in a dome-shaped cap; Delta kitchen faucets are the most recognizable. Cartridge — single or two handles that lift/push up-down rather than screw; smooth operation, very common in modern bathrooms (Moen, Pfister). Ceramic disc — single lever on a wide cylindrical body; handle moves side-to-side for temperature and front-to-back for volume. If unsure, search your faucet's brand and model number + 'repair kit' to confirm the mechanism type.
- 2Step 2 — shut off water and prepare the work area: turn off the angle stop valves under the sink (clockwise until they stop). If there are no angle stops, shut off the main house water valve. Turn the faucet handles to open to release remaining pressure and drain water from the supply lines. Place a towel in the sink basin to catch small parts. Put the drain stopper in the closed position so screws and springs don't fall down the drain. Take a photo of the faucet before disassembly.
- 3Step 3 — compression faucet repair: remove the decorative cap on top of the handle (pry with a flathead screwdriver). Remove the handle screw and pull off the handle. Use an adjustable wrench to unscrew the packing nut — turn counterclockwise. Pull the stem straight out of the valve body. At the bottom of the stem, find the rubber seat washer held by a brass screw — unscrew and replace it (match the shape: flat or beveled). Also inspect and replace the O-ring on the stem body. Inspect the valve seat inside the faucet body — run your finger around it; if it feels rough or gritty, use a seat wrench to remove it and a seat grinder to resurface it, or replace it. Reassemble in reverse, turn water on slowly, and test.
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Repair vs Replace
A dripping faucet is almost never a reason to replace the entire faucet unless the valve body is cracked or the faucet is severely corroded. Repair kits for all faucet types are widely available and cost $5–$40. Even premium Moen cartridges (Moen 1255) are $20–$30 and take 20 minutes to replace. The exception is a compression faucet with a severely pitted seat in a very old faucet body — resurfacing tools cost more than a budget replacement faucet. Consider replacement only if the faucet body is cracked, the finish is severely damaged, or the faucet uses a discontinued cartridge that costs more than $50.
Est. Repair Cost
$5–$40 depending on faucet type (compression: $5–$10; ball kit: $15–$25; cartridge: $10–$30; ceramic disc cylinder: $25–$40)
Est. Replacement Cost
$80–$400 for a new faucet (installed)
Recommended Tools & Parts
- Buy on Amazon →
Delta RP3614 Ball Faucet Repair Kit
Complete repair kit for Delta single-handle ball faucets: includes cam, plastic ball, seats, springs, and all O-rings. Fits most Delta ball-style kitchen and bathroom faucets. Replace the entire kit — don't try to identify just one bad part.
$12–$20
- Buy on Amazon →
Moen 1255 Cartridge (Single-Handle)
Replacement cartridge for Moen single-handle faucets. Genuine Moen part for Chateau, Monticello, and Posi-Temp single-handle faucets. Moen often provides free cartridge replacements under their lifetime warranty — call 1-800-BUY-MOEN before purchasing.
$20–$35
- Buy on Amazon →
Danco 88369 Seat Washer Assortment Kit
Assorted rubber seat washers for compression faucets. Includes flat and beveled washers in multiple sizes. Also includes packing washers and O-rings. Covers virtually all compression faucet seat washer replacements.
$5–$10
- Buy on Amazon →
Sil-Glyde Plumber's Grease
Silicone-based lubricant safe for rubber O-rings, seat washers, and cartridge seals. Critical for ball faucet reassembly. NEVER use petroleum-based grease (Vaseline, WD-40) on faucet rubber parts — petroleum swells and degrades rubber seals.
$6–$10
- Buy on Amazon →
Moen 104439 Cartridge Puller
Cartridge puller tool designed for Moen faucets. Grips the cartridge body and applies straight-pull force without rocking — prevents damage to the valve body when the cartridge is stuck from mineral deposits. Works on Moen 1225 and 1255 cartridges.
$8–$15
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
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Related Repair Guides
This section combines editorial `relatedSlugs` from the article source with metadata-based matches so each guide links deeper into the repair library.
Sink Faucet Dripping
Dripping faucet wasting water and driving you crazy? In most cases a worn cartridge or O-ring is the culprit — a $10–$25 part and 30–60 minutes fixes it permanently.
Read guide →Outdoor Faucet Not Working: Hose Bib Repair Guide
Outdoor faucet with no water, low pressure, or a drip from the stem? This guide covers freeze damage inspection, packing nut and washer replacement, vacuum breaker failure, and when to replace the whole hose bib.
Read guide →Outdoor Faucet Leaking
Outdoor faucet dripping or leaking at the handle? A worn packing washer or O-ring is almost always the cause — a $10 fix that takes less than an hour.
Read guide →Shower Faucet Dripping — Fix a Leaky Shower Valve Without Calling a Plumber
Shower faucet dripping even when off? A worn cartridge or valve seat is almost always the culprit — a $15–$40 part and 45–90 minutes stops the drip for good.
Read guide →Hose Bib Leaking
Hose bib dripping from the spout or leaking around the handle? Tighten the packing nut or swap the washer — most repairs take under 30 minutes.
Read guide →Toilet Flapper Replacement
Toilet running constantly or randomly refilling? A worn flapper is the #1 cause — replace it in 30 minutes for under $15.
Read guide →Keep Exploring
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Frequently Asked Questions
- Can I fix a dripping faucet without turning off the water?
- No. You must shut off water at the angle stop valves under the sink (or the main shutoff) before disassembling any faucet. Removing a packing nut or cartridge with water supply pressure active will result in water spraying forcefully from the valve body — potentially flooding the cabinet and surrounding area. Always turn the angle stops fully clockwise before starting. After shutoff, open the faucet handles to drain residual pressure from the supply lines.
- My faucet handle is stuck and won't come off — what should I do?
- Handles stuck from mineral buildup or corrosion should not be forced off — cracking a handle or the valve body is expensive. Apply a penetrating oil (WD-40 or PB Blaster) around the base of the handle where it meets the valve stem. Let it soak for 15–30 minutes. Try rocking the handle gently from side to side while pulling up — do not twist. For stubborn handles, a handle puller tool (available at hardware stores, $10–$15) applies even upward pressure without the cracking risk of a hard yank.
- I replaced the seat washer in my compression faucet and it still drips — what's wrong?
- A new washer won't seal against a pitted or damaged valve seat. The valve seat is the metal ring inside the faucet body that the washer presses against — over years of use, it develops a groove or rough spots from the metal-on-rubber contact. Feel the seat with your fingertip after removing the stem — a smooth seat feels like polished metal; a bad seat has a ridge or feels gritty. Use a seat grinder tool (Lasco 13-1625, about $15) to resurface it, or use a seat wrench to remove and replace the seat entirely if it's threaded (most are).
- Both of my bathroom faucet handles are dripping — should I replace both cartridges on the same visit?
- Yes, absolutely. If both handles are dripping, both cartridges have worn out — they were installed at the same time and have experienced the same amount of use. Replacing only the leaking one now means you'll be doing the same repair again in 3–6 months for the other side. Buy two cartridges on the same trip, replace both in one visit, and you're done for another 10–15 years. The labor for the second cartridge is minimal since everything is already disassembled.
- What's the difference between a ball faucet and a cartridge faucet if they both have one handle?
- The key difference is in the mechanism and handle motion. A ball faucet has a handle that rotates in all directions over a dome-shaped cap — push up to increase flow, rotate left for hot, right for cold. You can feel the ball mechanism moving inside. A cartridge faucet typically has a handle that moves front-to-back (or up-down) for volume and side-to-side for temperature — the motion is more constrained. Internally, a ball faucet has a slotted ball, seats, and springs; a cartridge faucet has a single cartridge that slides straight up into the valve body. Delta makes ball faucets; Moen, Pfister, and most other brands make cartridge faucets.