How to Fix a Leaky Shower Head (Step-by-Step Guide)
A leaky shower head wastes 500+ gallons a year. Fix it in 30 minutes with a $5 washer or a roll of Teflon tape. Step-by-step guide for drip and base-leak repairs.
Quick answer: A leaky shower head usually drips for one of three reasons: a worn rubber washer or O-ring inside the head, mineral deposits blocking the flow and forcing water past the seal, or loose threads at the wall connection. Shut off the water at the shower valve (or the main if there’s no dedicated valve), unscrew the shower head, replace the washer, clean out the lime deposits, wrap fresh Teflon tape on the arm threads, and reinstall. Most repairs run under $10 in parts and take about 30 minutes.
A shower head dripping after you shut off the water is easy to ignore. Until you do the math. The EPA’s Fix a Leak campaign puts the waste at roughly 500 gallons a year for a slow drip. For a faster one, WaterSense data suggests a faucet leaking one drip per second sends more than 3,000 gallons down the drain annually. That’s real money at current water rates.
Most shower head leaks are mechanical failures: a rubber washer softened by minerals, an O-ring that’s dried out, or a threaded connection that never had enough Teflon tape. None of those require a plumber.
What You’ll Need
- Adjustable wrench or large channel-lock pliers
- Teflon tape (also called plumber’s tape or PTFE tape), about $2 a roll
- Replacement washer or O-ring kit (check your shower head model, or bring the old ones to the hardware store)
- White vinegar
- Small plastic bowl or bag
- Old toothbrush
- Penetrating oil (PB Blaster or Liquid Wrench) if the head is stuck
- Rag or towel (protect the chrome finish from the wrench)
Step 1: Identify Where the Leak Is Coming From
Before grabbing the wrench, spend 30 seconds figuring out exactly where the water is appearing.
Drip from the shower head nozzle: water drips out of the spray face after you shut off the shower. Nine times in ten it’s a worn washer or O-ring inside the head itself, or mineral buildup forcing water past the seal. It can also mean the cartridge or diverter valve is letting water bleed through, but start with the head.
Leak at the wall connection: water seeps out where the shower arm threads into the wall fitting. This is a Teflon tape problem. The original tape has dried out or was applied too thin.
Spray head wobbling and spraying sideways: the swivel joint or ball joint on an adjustable head has a worn O-ring. Usually a $2-3 fix.
The location determines what you replace. Most of this guide covers the most common scenario: drip from the nozzle face plus possible thread leak.
Step 2: Shut Off the Water
Turn the shower knob fully off, then check that the drip actually stops. If it does, the water supply is fine and the problem is the head itself.
If you need to remove the shower head for work (you will), you don’t need to shut off the house main for most setups. The shower valve controls flow to the head. Closing it fully is enough. But if your valve doesn’t shut off cleanly, shut off the water at the main; it takes two minutes and prevents a mess.
Run the shower briefly after shutting the valve to bleed pressure from the line before you start loosening anything.
Step 3: Remove the Shower Head
Wrap a rag around the shower arm (the pipe coming out of the wall) where it meets the shower head. This protects the chrome.
Grip the shower head connection with channel-lock pliers or an adjustable wrench over the rag. Turn counterclockwise. Most heads haven’t been off in years, so expect resistance. If it doesn’t budge, spray a little PB Blaster at the thread connection and wait 10 minutes. Don’t apply heat to the shower arm; it’s screwed into a plastic fitting inside the wall on most modern showers.
Once the head is off, keep the shower arm still. It threads into the wall fitting, and if you twist the arm itself you can crack the fitting inside the wall. That’s a different project entirely.
Step 4: Clean Mineral Buildup
Fill a plastic bowl or a gallon zip-lock bag with white vinegar. Submerge the shower head face-down and let it soak for at least an hour (overnight is better for heavy buildup).
Calcium and magnesium deposits from hard water block the nozzle holes and build up around the internal washer seat. When the holes clog, water pressure behind them finds any gap it can, including past the washer. Cleaning first sometimes resolves the drip without replacing any parts.
After soaking, use an old toothbrush to scrub the nozzle holes. Run warm water through the head from the threaded end. You should see solid flow from every nozzle.
Step 5: Replace the Washer or O-Ring
With the head removed, look inside the threaded connection end. You’ll see one or more rubber seals: a flat washer, a tapered O-ring, or both depending on the brand.
Pry out the old washer with a flathead screwdriver or your fingernail. It should come out cleanly. If it’s brittle, cracked, or looks like it’s been there since the Clinton administration, that’s your leak.
Take the old washer to a hardware store and match it. Most shower heads use standard sizes that cost under $2 for a pack. If you can’t get there easily, most showerhead manufacturers (Moen, Delta, Kohler, American Standard) publish the replacement part numbers on their websites, and the right O-ring kit runs $5-8 and ships in two days. The washer logic is identical to fixing a dripping faucet, just a different seat location.
Press the new washer into the seat firmly. It should sit flush with no gaps.
Step 6: Wrap the Arm Threads with Teflon Tape
Before reinstalling, strip the old Teflon tape off the shower arm threads completely. Layers of old tape compress unevenly and the new tape won’t seal right over them.
Wrap fresh tape clockwise (the same direction you’ll tighten the head) starting at the base of the threads. Three to four wraps, pulled tight so it seats into the threads. Overlap slightly as you go. The tape should fill the threads visually; you shouldn’t see bare metal between the tape wraps.
This solves the thread-connection leak and prevents the head from seizing up again. Even if the arm looks fine, always apply fresh tape when reinstalling.
Step 7: Reinstall and Test
Thread the shower head back onto the arm by hand until it’s snug, then tighten with the wrench, one quarter to one half turn past hand-tight. Don’t overtighten. You’re sealing a tapered threaded connection, not clamping something; too much torque cracks the fitting inside the shower head.
Turn the water back on and run the shower at full pressure for 30 seconds. Check the nozzle face: all holes should spray clean, no drips coming from the connection point at the wall. Turn the shower off and watch for 60 seconds. If it’s dry, you’re done.
If there’s still a slow drip from the nozzle after replacing the washer and cleaning the head, the issue is the shower valve cartridge, the actual flow-control mechanism inside the wall. That’s a different repair. Replacing a shower cartridge uses different tools and involves cutting off water at the main, but it’s still a DIY job.
Common Mistakes
Overtightening the shower head. More torque doesn’t equal better seal; Teflon tape and the rubber washer do the sealing. Overtightening cracks plastic heads and strips threads on metal ones. Hand-tight plus a quarter turn is the target.
Skipping the vinegar soak. It’s tempting to skip straight to part replacement. But mineral buildup is the cause of half the leaks I’ve seen. An hour of soaking saves you a hardware store trip.
Reusing old Teflon tape. Old tape compresses and doesn’t seal evenly. Takes 90 seconds to strip and rewrap, and it’s the cheapest part of the job. Don’t skip it.
Twisting the shower arm. When loosening the head, anchor the arm with one hand. If the arm turns, it can loosen the fitting inside the wall and you’ll have water in the wall cavity next time someone showers.
Not identifying the leak source first. If the leak is coming from the cartridge valve inside the wall, no amount of washer work on the head fixes it. The drip test (turn off shower, watch for 60 seconds) tells you whether the head is the problem or just the visible symptom.
FAQ
How do I know if the leak is the shower head or the valve? Turn the shower off and watch closely. If the drip comes from the shower head nozzle face and slowly stops, the washer inside the head is the issue. If water continues dripping from the arm even when you unscrew the head, the cartridge or diverter valve is leaking past the seat; the head is just the exit point.
Can I fix a leaky shower head without turning off the water? You can replace a shower head with just the shower valve closed. You don’t need to shut off at the main unless your shower valve leaks through when fully closed. Bleed the line first by turning the shower on briefly after closing the valve.
What kind of Teflon tape should I use? Standard white PTFE plumber’s tape works fine. Pink tape (thicker, marketed for water lines) is fine too. Don’t use yellow gas-line tape; it’s a different compound and not appropriate here.
My shower head was leaking where it meets the wall, not from the nozzle. Is that different? Yes. A wall-connection leak is purely a thread seal issue: old or missing Teflon tape. Unscrew the head, strip the old tape, wrap three to four layers of fresh tape clockwise on the arm threads, reinstall. That’s usually all it takes.
How long does a shower head washer last? In soft water, a rubber washer lasts 8-12 years. In hard water with mineral content above 7 grains per gallon (roughly 120 mg/L), the calcium deposits accelerate washer degradation. The USGS water hardness map can tell you where your area falls. If you’re replacing washers every 2-3 years, a whole-house water softener is the longer-term fix to investigate.
Why does my shower head drip only sometimes? Intermittent drips after the shower has been off for a while usually mean residual water in the shower arm draining out. That’s not a leak, just gravity. If the drip continues more than a minute or two after shutting off, or gets worse over time, it’s the washer.
Should I replace the whole shower head or just fix it? If the head is more than 10 years old, clogged with mineral deposits that vinegar won’t clear, and the spray pattern is uneven, replacing it is often cheaper than chasing a bad seal. A decent Moen or Delta shower head runs $25-50 and includes everything you need. Under $50 is the right price for a standard fixed head.
What’s the difference between a leaky shower head and low water pressure? They often look similar (poor spray, dribbling) but have different causes. Low pressure is a whole-system or whole-fixture issue; check if other faucets are affected. Low water pressure in a single shower usually means mineral buildup blocking the nozzle holes, which the vinegar soak in this guide fixes. A leak is specifically water escaping a seal, dripping after shutoff or spraying from the connection.
Conclusion
Most shower head leaks come down to one of three cheap parts: a $2 rubber washer, a $2 roll of Teflon tape, or both. The vinegar soak handles the mineral buildup that accelerates both failures. Thirty minutes of work, under $10 in parts, and 500 gallons of annual water waste off your bill.
If the leak persists after the washer and tape work, the next stop is the shower cartridge inside the valve. That repair goes a bit deeper into the wall but follows the same logic: find the worn part, replace it, restore the seal.