Water pipes hammer


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Old 07-07-17, 02:53 AM
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Water pipes hammer

I have a relatively new home with a pressurized system, the tank is a 5 gallon 100 pound capacity located near the service entrance. The water from the street is regulated to 65 pounds, the tank is set for 65 pounds, and I am getting hammering from the washer only. I have installed anti-hammering devices on the back of the washer but still getting the noise. The washer is a newer style front loading LG, any suggestions where to start?
 
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Old 07-07-17, 06:23 AM
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Can you trace the water hammer to one particular pipe?
 
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Old 07-07-17, 06:31 AM
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Its only the hot which is a long run of 1/2" copper.
 
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Old 07-07-17, 06:50 AM
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Is it secured to the joists properly?
 
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Old 07-07-17, 07:38 AM
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The piping is attached to the rafters with plastic c clips. The clips come supplied with a single nail to set in place.
 
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Old 07-07-17, 09:35 AM
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Are you getting the hammering when the washer stops the hot water from filling the machine? Is the noise stronger near the washer, near the tank or further down the line?
 
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Old 07-07-17, 09:43 AM
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Correct, when the hot stops filling. Noise seems near the washer itself and localized to that area.
 
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Old 07-07-17, 09:59 AM
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And just to confirm, you are hearing water hammer. It's a loud bang when the water is turned off (or sometimes on). It's not a vibration while the water is being used. They are two different issues typically caused by different things.
 
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Old 07-07-17, 10:09 AM
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Is that tank just hanging by the pipes? How about some pics?
 
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Old 07-07-17, 10:19 AM
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The noise is only when the gate closes to turn off the supply, otherwise its quiet.
 
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Old 07-07-17, 10:24 AM
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The tank is approx. 80 feet away from the washer and is secured from the piping on top along with the fact that its sitting on a very secure wooden platform, no issues there.

Possibly the valve in the washer? is that possible?
 
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Old 07-07-17, 11:36 AM
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I would check the hot hose bib for a loose washer. If that's not it, it may be the solenoid valve in the machine, but I'm betting on the hose bib.
 
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Old 07-07-17, 12:40 PM
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The faucet, really? Its a two in one type.
So replace it.
 
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Old 07-07-17, 06:41 PM
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I'm guessing that you mean one lever for both hot & cold. It's still 2 valves with two washers, and the hot side may have a loose washer.

For some reason this has been coming up a lot lately on this forum. A loose washer, in a fixture or valve, can vibrate like a reed in a saxophone. It will make a hellacious noise and is often referred to as water hammer, which it is. The solution is to tighten and/or replace the washer. I don't know if you have to replace the entire valve in your particular case, or if it's repairable.
 

Last edited by steve_gro; 07-07-17 at 07:33 PM.
 

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