How To Fix Noisy Shower Pipes and Stop the Banging Noise
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How to Fix Noisy Shower Pipes - Making a Banging Noise
How to Fix Noisy Shower Pipes - well actually it's the shower faucet hardware making a banging noise. If you ever encounter a loud banging noise in your shower, don't look behind the curtain. I had just finished renovating my bathroom, including installing new shower plumbing, new tub, fresh ceramic tiles and the works, everything looked and worked great. I actually have two bathrooms back-to-back, and now started work on the second bathroom. You might question my sanity renovating two bathrooms one after another, but I'll leave that topic for another day.
The second bathroom was a conversion from a tub-shower to a shower surround. I had removed the old bathtub, removed all of the old ceramic tiles and opened up the wall where the shower hardware was located. I had purchased new shower hardware and hired a professional to perform the install. After the new shower hardware was installed the installer had tested the new shower hardware for leaks and everything looked good.
Seeing as I had just finished the first bathroom reno, I was in no rush to begin immediately on the second bathroom, which was a good thing. The next day we noticed that whenever we shut off the water taps on the first bathroom, there was a banging noise. At first the noise was subtle and as each day passed the noise got louder and louder. In fact the same noise was heard when flushing the toilet and also when turning off the water in the shower. The banging noise sounded like two pipes were banging together and always occurred when the water was shut off.
Tools Required to Fix Noisy Shower Hardware
Disassembly - Remove Cap from Shower Handle
Disassembly - Remove Shower Lever - One Screw
Looking For The Noisy Shower Pipes
I figured I better check out these noises, especially since we were now down to one functional bathroom. The first thing I thought of was perhaps there were a few pipes banging together whenever the water was shut off. Since both bathrooms share a common wall for all plumbing, there is a bit of a maze of copper piping. The wall in the second bathroom was still open from when the new shower hardware was installed. So I took my flashlight and looked inside the wall cavity for any pipes that may be in need of securing. Could not see any thing loose.
I had my family flush the toilet and turn the shower on and off repeatedly in the first bathroom, so I could listen to the noise in the wall and see where it was coming from. Since I was renovating the second bathroom anyway, I figured I would open up the entire wall so I could pinpoint the area where the banging noise was coming from. I finally determined there were in fact no loose pipes knocking against each other or on the wood studs. But the noise was coming from the first bathrooms shower hardware. Interesting, as this was absolutely fine until the second shower unit hardware was installed.
So I called in a plumber to check out the new shower hardware in the first bathroom. He disassembled the shower hardware and pulled out the "cartridge", a replaceable unit. He didn't have a spare to match our hardware but said I could get one at any local home hardware store.
Disassembly - Remove Outer Sleeve
Disassembly - Remove Cover Plate - Two Screws
Noisy Shower Hardware Was Making the Banging Noise - Here's How to Fix
I bought a new cartridge and replaced the part myself, but the noise was still there. I took apart the shower hardware again and this time dove deeper inside. There was another little removable part to the left of the cartridge, that looks like a small flute; made of metal, cylindrical in shape with holes strategically placed around its shell. I removed this part, and then re-inserted it into the shower hardware and reassembled. When I tested the shower, the noise was finally gone.
If you ever encounter a banging noise in your shower and can't determine where it's coming from, do not open up your walls or call a plumber. Simply open up the shower hardware and remove and re-insert the components illustrated. This will save you and your family a lot of grief. There was likely an air lock inside the shower hardware, which in turn caused the banging noise whenever the water valves were shutoff. The air lock may have been caused when the new shower hardware was installed in the second bathroom or maybe that was just a coincidence.
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Disassembly - Shut off Water Screws - Remove the Cartridge
Disassembly - Remove Water Coupler
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How to Disassemble Shower Hardware
There are just a few simple steps required to disassemble the shower hardware, also illustrated in this article. First remove the Cap off the end of the shower lever, in my case I could easily remove this by hand with a little twist action, Once the cap is removed, remove the screw that secures the shower lever. Note never place any parts or tools directly on the bathtub or other porcelain like objects as they could get easily scratched.
The shower hardware sleeve or outer casing can now be removed by simply unscrewing the sleeve unit. Once the outer casing is removed, there should be at least two screws visible, which hold the cover plate to the wall. Remove these two screws and the cover plate.
With the cover plate removed, you should see two valve screws. These are water valve shutoff screws and must now be closed before removing any more parts. Close the water shutoff valves by turning these screws clockwise until that can turn no more. If you have an older shower hardware unit, there will be no set screws. In this case, shut the water off at the main water valve for your home.
Once the water has been shut off, either by the two set screws or your homes main water valve, pull the cartridge out of the hardware. Sometimes this unit may need replacement. In my case the problem was an air lock in the water coupler.
Locate the water coupler beside the cold water line. It is hidden behind and connected to a large screw. Remove the screw and the coupler will follow, they are one. Simply reseat the coupler and then reassemble the shower hardware in the reverse order. Don't forget to turn the water valve set screws back on fully, once you have the coupler and cartridge back in place.
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