Shower head leaking: causes at the connection, when it drips after you turn it off and how to fix it
If water is coming from where the shower head meets the arm, the most common cause is a loose or poorly sealed threaded connection, and re-taping the thread or replacing a worn washer usually fixes it in a few minutes. If the drip continues after you've turned the shower off completely, though, the shower head itself usually isn't the problem — that points to the valve behind the wall instead, which is a different repair. This guide walks through how to tell those causes apart, how to fix the connection, when limescale rather than a worn part is behind it, and how to judge whether the leak has already reached the wall.
- Check the thread, the swivel ball joint, the face plate and, on a handheld unit, both hose ends separately, since each one seals differently and fails differently.
- PTFE tape and a fresh washer solve most thread leaks; limescale buildup is a separate cause that needs soaking and reseating instead of more tape.
- A drip that keeps going after the water is fully off points to the valve or cartridge, not the shower head — that repair is inside the wall.
- Discoloration, a musty smell or a patch that won't dry are signs the leak has already reached the wall and needs more than a tape-and-washer fix.
Where is the shower head actually leaking from?
Before replacing anything, find the exact spot the water is coming from, since the repair differs for each one. Start with the thread where the arm screws into the shower head, which is the most common failure point and the one PTFE tape is meant to fix. If the head pivots, check the swivel ball joint separately: it seals with its own O-ring, independent of the thread. Then look at the face plate or spray plate on the head itself for a hairline crack or a seal that has worked loose from repeated cleaning. If you're dealing with a handheld unit, check both ends of the hose, since either connection can be the source.
| Where you see water | What it usually means |
|---|---|
| At the joint where the arm meets the head | Worn tape, a loose fitting or a damaged washer at the thread |
| Around a pivoting ball joint | A worn or misseated O-ring inside the joint |
| From the face plate or spray holes | A crack in the plate, or limescale preventing it from seating properly |
| At either end of a handheld hose | A worn hose washer or a loose hose connection |
| Only continues after the water is off | The valve or cartridge behind the wall, not the shower head |
Fixing a leak at the thread or hose connection
Once you've located a thread or hose leak, the fix is usually quick.
- Turn off the water supply to the shower — at its own shut-off valve if there is one, or at the main if not — before taking anything apart.
- Unscrew the shower head from the arm and look closely at the threads and the small rubber washer inside the connection for wear, flattening or cracking.
- Wrap PTFE (plumber's) thread-seal tape clockwise around the threads, in the direction you'll be screwing the head back on. PTFE has largely replaced older paste-type thread compounds in plumbing because it stays chemically stable against water and common fitting materials, and wrapping it onto a threaded joint like this is a standard way to seal the connection and stop this kind of leak (source: EPA WaterSense, Polytetrafluoroethylene, Wikipedia).
- If the rubber washer is cracked or flattened rather than round, replace it. Tape alone won't compensate for a washer that has stopped sealing.
- Hand-tighten the head back on, snug it slightly further with a wrench wrapped in a cloth to protect the finish, then run the water and check the joint for drips before calling it done.
It's worth doing this properly the first time: the EPA notes that a shower head leaking at roughly ten drips a minute wastes more than 500 gallons of water over a year, and leaks across an average home add up to well over 9,000 gallons a year (source: EPA WaterSense).
When limescale, not a worn part, is the cause
If the washer looks fine and the tape is intact but the leak persists, mineral buildup may be the real cause. Limescale is a hard calcium-carbonate deposit left behind by dissolved minerals in hard water, and it can build up on threads or inside a face plate to the point that it stops parts from seating fully, which shows up as a leak even though nothing is actually broken (source: Limescale, Wikipedia). Clearing that buildup means soaking the shower head, in a descaling solution or diluted vinegar, and then reseating the connection properly, rather than adding another layer of tape or a new washer. In a hard-water area, treat this as something to check again every few months rather than a one-time fix, since the deposits will keep reforming.
Still dripping after you turn the water off? Look at the valve, not the shower head
A leak at the shower head connection stops the moment the water is off, because nothing downstream is under pressure once the valve is closed. If water keeps dripping after that, the shower head usually isn't where the problem lives; the valve behind the wall is. In an older compression-type valve, a rubber washer presses against a fixed valve seat to seal the flow, and both wear over time. Once either one is pitted or worn, the valve can no longer close fully, which is exactly why a drip can appear or continue even with the handle turned all the way off (source: Tap (valve), Wikipedia). Newer cartridge or ceramic-disc valves work differently, and when they fail, the usual repair is to replace the whole cartridge rather than a single part inside it. Either way, this repair sits inside the wall behind the shower handle, so it's a bigger job than the shower head fix above, and it often means shutting off water at the main rather than just the shower's own valve.
How to tell if the leak has reached the wall
Before assuming a tape-and-washer fix has solved everything, check the surrounding area for signs the leak was already spreading before you caught it. Look for discoloration, a soft or slightly bulging patch, or peeling paint on the wall or ceiling near the shower, including the wall on the other side of the room, since water travels along framing before it shows up. A musty smell that doesn't clear with ventilation is also worth taking seriously: mold can start establishing itself within one to two days of an area staying consistently wet (source: Water damage, Wikipedia). Don't judge this by how small the visible drip looks, either. A supply-line crack as narrow as an eighth of an inch can release up to 250 gallons of water a day, so a leak that seems minor at the fixture can still be doing real damage out of sight (source: Water damage, Wikipedia). If you suspect the leak has reached the wall but can't confirm it by eye, that's the point where a plumber's moisture meter or thermal camera earns its cost over guessing.
When to call a plumber
Most shower head leaks are something you can fix yourself with tape, a washer and a few minutes. Call a plumber instead when any of the following apply:
- The drip is coming from inside the valve or cartridge rather than from the shower head connection itself.
- You see or smell signs that the leak has already reached the wall, ceiling or the floor below.
- The leak comes back after a proper tape-and-washer repair, which points to a worn valve seat or a pipe issue rather than the shower head.
- You're not confident shutting off water at the main, which some valve repairs require.
Fixing the shower head or the valve deals with the leak you already know about. For leaks that happen when no one's around to notice, such as a slow drip overnight or a supply line failing while you're away, some homes add a separate whole-house water leak detector with an automatic shut-off valve, which monitors flow on the main line and can close it if something looks wrong. It's worth being clear about what that does and doesn't do: an alarm or an automatic shut-off doesn't undo a leak that has already happened, and no device can guarantee that water damage won't occur. It's a layer of monitoring on top of fixing what you can see, not a replacement for it. Our guide to how these auto shut-off systems work goes into more detail on how that kind of monitoring behaves day to day.
If today's leak turned out to be at a different fixture, the diagnosis process is similar but the parts differ; see our guide to why an outdoor faucet handle or spout drips. And if a shower head repair turns into replacing a whole supply line, it helps to know the difference between crimp, press and push-fit fittings before you start, covered in our guide to connecting flexible water line.
Most shower head leaks come down to a choice between two fixes: reseal or replace the connection at the thread, or clear out limescale that's stopping a good seal. The exception is a drip that survives shutting the water off completely. That one is inside the wall, and it's worth treating differently rather than repeating the same tape-and-washer fix on a part that isn't actually the cause.