How To Fix A Leaking Shower Arm
2025-12-18
Shower Arm Leaking? Stop Knock Down The Wall—It Might Not Be as Bad as You Think
If you notice water leaking from the shower arm while you are showering, don’t jump to the worst conclusion. In normal situation, it's just a small issue like the seal isn't tight, though occasionally it can relate to pipes inside the wall. The key point is find out exactly where the leak is coming from.
Let's quickly clarify what a shower arm is.
It's that short, usually curved pipe extending from the wall, with threads on both ends:
It's that short, usually curved pipe extending from the wall, with threads on both ends:
The inner end screws into a fitting called a drop-ear elbow embedded in the wall;
The outer end is where the shower head attaches.
When dealing with this kind of leak, the first step is never to fix it—it's to figure out where the water is actually coming from.
Why do shower arms leak?
The common reason of shower arm leaking are actually not complicated.
First, we need to observe the location of the water leaking then judge the possible cause based on the origin of the water leaking.
Scenario 1: The shower arm has two end, one end connects to the drop ear elbow / water suuply pipe inside the wall, and the other end connects to the shower head. If there is no water leaking from either end, we can notice and discover that the origin of water leaking is from the shower arm itself. Cracks or gaps can be observed on the surface of the shower arm at the water leaking point. We can have a conclusion that the surface break on the shower arm causes water leaking. The cause could be a quality defect or huge water pressure.
Scenario 2: The surface of the shower arm is not leaking. The leak is at the joint connecting to drop ear elbow / water suuply pipe inside the wall or the joint connecting to the shower head. First, check the sealing if is insufficient. Insufficient sealing could be due to frequent adjustments at the joint over long-term use, causing thread wear, or it could be due to aging of the sealing tape. Users can try replacing the sealing tape or wrapping it several times before reinstalling to see if this solves the leak.
Scenario 3: If neither of the first two scenarios applies, then it is highly likely that the thread of shower arm or drop ear elbow / the water pipe inside the wall burst due to excessive force applied during use or installation. Therefore, it is necessary to replace the shower arm or repair the water pipe inside the wall.
Scenario 1: If the water leak is coming from the joint of the shower head
If you see water seeping out where the shower head connects to the shower arm, don’t unscrew the shower head right away. Pls take a closer look first.
Some shower heads that look metallic are actually made of plastic with a chrome-plated finish. Plastic is more prone to cracking than metal, especially if it’s been overtightened or knocked around.
If you don’t see any obvious cracks, follow these steps:
1. Remove the shower head
If the shower arm tends to turn with shower head, hold the arm steady with a wrench. Wrap the jaws with tape to avoid scratching the finish of the shower arm.
If the shower arm tends to turn with shower head, hold the arm steady with a wrench. Wrap the jaws with tape to avoid scratching the finish of the shower arm.
2. Clean the thread of shower arm
Clear off any old Teflon tape, sealant, or mineral buildup—a step many people overlook.
Clear off any old Teflon tape, sealant, or mineral buildup—a step many people overlook.
3. Apply new Teflon tape
Wrap it in the direction that tightens the showerhead (usually clockwise).
Wrap it in the direction that tightens the showerhead (usually clockwise).
4. Reattach the shower head
Screw it on until snug—no need to crank it down. If it’s stiff, use one wrench to hold the arm and another to gently tighten the head.
Screw it on until snug—no need to crank it down. If it’s stiff, use one wrench to hold the arm and another to gently tighten the head.
5. Test it
Turn the water on. If it still seeps slightly, give it a little more twist. If that doesn’t stop the leak, the shower arm itself likely needs replacing.
Turn the water on. If it still seeps slightly, give it a little more twist. If that doesn’t stop the leak, the shower arm itself likely needs replacing.
Scenario 2: If the water leaking is from wall inside
If you've determined that the water leak isn't coming from the shower head but from wall inside, then you need to focus on the drop ear elbow joint.
The shower arm screws into this drop ear elbow joint, which is also a threaded connection point and can leak due to poor sealing.
The solution is still straightforward:
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Dispatch the shower arm, clean the thread, reapply Teflon tape, and screw it back in;
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If the shower arm is cracked or corroded, replace it with a new one.
Note two pionts during the process:
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Make sure the threads are properly aligned and avoid cross-threading;
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Do not overtighten, as damaging the pipe fittings inside the wall will complicate things.
Scenario 3: Problems with the Water Pipes Inside the Wall
If the shower arm still has water leaking issue no matter how you install it, the problem likely extends beyond the shower arm itself, such as:
The elbow fitting itself is damaged;
There is a leak in the vertical shower pipe inside the wall.
It is recommended to fix it by a professional plumber.
For some older bathrooms, this might even be an opportunity to consider upgrading the entire shower system.
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