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Jerry
Jerry, hearth products
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Experience:  owned and operated stove retail and service 12 yrs
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In my upstairs bathroom the pipes under the sink make a loud

Resolved Question:

In my upstairs bathroom the pipes under the sink make a loud banging noise when I flush the toilet or turn on the water. So far it finally stops after I run the water for several minutes. Sounds like its going to blow up ??
Submitted: 11 months ago.
Category: Home Improvement
Expert:  Jerry replied 11 months ago.

Jerry :

Welcome to JA!

Jerry :

This is most likely a case of water hammer. It is usually caused from a loose pipe in the wall that bangs against the wood when a fast acting valve closes (toilet fill valve).

Jerry :

The best solution is to open the wall, and secure the pipes.

Jerry :

You can also install a water hammer arrester at the toilet stub out. But unless the pipe are very hard to get to, it is usually best to find where the banging is happening and secure the pipe.

Customer: is it ok to use in the meantime? What's the worst that could happen until I get a plumber out?? This is in a teenagers room?
Jerry :

It is okay to use, it is just very annoying. You can run the hot and cold water in the sink until the toilet has finished the cycle, then turn off the water slowly, this should stop the hammer.

Jerry :

Worst case scenario is the pipe would bang so hard it would break the pipe, This is NOT likely.

Customer: Is this a costly fix?
Jerry :

Depends on how hard the pipes are to get to, I think you will have a plumber costs of about 1 hour, (150.00) sheet rock repair possibly, (250.00) and maybe install a new fill valve in the toilet. (85.00) So the cost could range from 300.00 to 600.00 depending on your labor rates in your area.

Customer: Thank you At least I can wait until Mon so as to it incur higher rates. I appreciate your help
Jerry :

You are welcome, thank you for using Just Answer!

Jerry, hearth products
Category: Home Improvement
Satisfied Customers: 3318
Experience: owned and operated stove retail and service 12 yrs
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