Just recently I have begun hearing a motor type sound in my house every time the water is running (washing machine filling, toilet flushing, dishwasher running, etc... ). It seems to be coming from behind the wall in my basement near where the water line actually comes into the house. I have been in the house for 5 years and it just started less than a week ago. Any ideas on what the noise is coming from and is it a sign of a bigger problem?

A pressure pump?

Are u on city water or private well?

If city water could be loose washer in shut off valve. When water pass over washer it will viabrate.

This can also be problem if on well water.

Let us know how u make out.

Chuck

Is there a PRV,( pressure reducing valve,( see image)? Is the house shut off completely opened? Let me know, Tom

Also, do you have a water softener near incoming water? Please anwer all questions above and we will take it one step at a time. Is water meter located inside the house, or outside the house(if on city water). Lee.

Thanks to all for the quick response...

I am on city water.
Meter is outside the house.
Do not have a water softner (that I am aware of).
There is a PRV.
The shut off is completely open

Does the noise seem to be louder at the prv, or outside at the meter?

Noise = vibrations. Feel where the vibration's the strongest. Let me know. Tom

The noise sounds as if it is coming from behind the wall (the basement is finished) where the access to the shut-off and PRV happens to be. I can feel the vibration in the PRV.

I can feel the vibration in the PRV. Then you have located your source, Replace the PRV. Good luck, Tom