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 "Hammering" sounds from pipes
Author: Jeff_Isaac (MD)

I have this “hammering” noise in my pipes when both my wife & I shower is on and my daughter’s shower is on at the same time. This is the only time this happens when both showers are on at the same time.

Now when we run them at separate times (i.e. we run our shower and they have theirs off and vice versa, no problems, no noise) I’m hoping there is a simple solution to this as this has just started happening. My wife & I has gotten a recent shower remodeled done. Could this be related? We have always been able to run both showers at the same time without any issues and without any noise. Until recently that is.

How do i get the sound to stop? Pretty annoying when this happens. Hasn't done this before.

Hope you can help with any advice you can give,

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 Re: "Hammering" sounds from pipes
Author: Pipe runner (AZ)

first thing to check is to see if there is excessive water pressure in your house water piping.
check your pressure at a hose bib. Anything over 80 PSI is considered too high.

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 Re: "Hammering" sounds from pipes
Author: Jeff_Isaac (MD)

Thanks for answering. Greatly appreciated. :-) Another question......what is a hose bib and where do I find it? Also, what is the device called to check PSI once I find it.

Would turning the main water valve to entire house and then turn on faucets to drain remaining water from faucets/showers until empty? Would thos solve it as well? I'm asking because I read somewhere that this may solve it as well?

Thanks again! More than you know. :-)

Edited 1 times.

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 Re: "Hammering" sounds from pipes
Author: North Carolina Plumber (NC)

A hose bibb is where you hook up a garden hose, it may be on the outside of the house, you can also find one at the bottom of the water heater, or where you hook up a washing machine. A pressure gauge with female hose threads will be what you need to check the pressure.

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 Re: "Hammering" sounds from pipes
Author: Paul48 (CT)

My WAG is that there is a battle between 2 pressure balanced shower valves going on.

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