pulsating water pipe


  #1  
Old 05-19-07, 01:08 PM
H
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pulsating water pipe

Hello and thanks in advance.

The problem i am having is with pulsating water in a bathroom -three year old addition.
When the cold water is on the water will pulsate. It happens when using the sink, or the shower, or when the toilet is flushed.
At the same time i can hear the pipe in the attic 'pulsating'.
I don't think it is water hammer because it is only when the water is on, not when it is turned off. It also does not matter how long the water is on for. I did install a anti-hammer device on the toilet -it made no difference.
I replaced the faucet at the sink and it made no difference.
It also makes no difference what volume of water is coming out -it still does it the same.
The feed line is approx. 25 feet, and size is one half inch.
Thanks again.
 
  #2  
Old 05-19-07, 01:19 PM
F
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That's a good one.

Normally such an action is caused by a loose washer on a valve and is confined to the single unit that is at fault.

You stated that this is in a addition. Is it possible that the plumbing to the addition has a separate "main" valve to cut off the water from the original system? If so then I would look at this "semi-main" shut off valve for it not being fully open (if a gate valve) or a loose washer (disc) if it is a gate valve.
 
  #3  
Old 05-19-07, 04:56 PM
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pulsating water & pipe

Thanks furd.
Unfortunately there is no valve or shut off for this.
The tie in is at the tub pipes in the master bath.
 
 

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