Question:
When any one of the three toilets finish filling and the water turns off, or when the faucets in the bathroom are turned off, there is a moaning noise. What is it and how do we eliminate the noise?
Answer:
Make sure the shut off valves under the sinks and toilets are open all the way. It sounds like one may be partially closed.
Follow-up Question:
I have checked all three toilets and all are fully open. The noise also is
produced when the water stops flowing into the washer. What should I do
next?
Follow-up Answer:
Install spring loaded air arrestors on your cold water line. These are available at your local plumbing supply store.