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alsmom

07:37AM | 07/08/04
Member Since: 07/07/04
1 lifetime posts
Bvplumbing
I moved into my single story ranch style house in August 2003. When the toilet is flushed in the hall bathroom several seconds later there is a loud sound I'm assuming is air in the pipes. There is a loud shaking sound coming from what sounds like behind the refrigerator in the kitchen. The frig does have ice/water on the door. Since the weather got warm this spring it is no longer just one long rumbling sound, but now it is short bursts of the rumbling noise until the toilet tank has refilled. Is it air in the pipes or could it be pipes knocking together? Any ideas? By the way, this does not happen when the master bath toilet is flushed and that bath shares a wall with the other one. Also there is no noise when the water/ice maker is used.

tomh

08:35AM | 07/08/04
Member Since: 07/01/03
550 lifetime posts
The problem is actually a lack of air in your pipes and a toilet valve that is shutting down rapidly causing "water hammer". Lots of plumbing is installed to include air chambers that cushion water hammer by providing a compressible air pocket. These chambers can become water logged over time and the water hammer can get severe.

Two ways to deal with this. First, consider a new flush valve that shuts down gradually. This avoids the problem. Second, turn off the main water valve, then open all the faucets, to let the pipes drain. This should restore any air chambers. When the water refills you should notice the water hammer is gone.
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