Can anyone identify this sound?

Question

Recently in my house, there has an occasional loud noise. I'd describe it as a groaning and I believe it may be coming from the pipes. It usually lasts 15 seconds or less, but is very loud.

What might the problem be?

Answer 1

maybe the heating system in your house. sometimes when you furnace is running. the water will make a groaning sort of noise when it is warming up.

Answer 2

A house has a life of it's own, especially when your alone and your quiet. The house will moan and groan, it's own life.
The water pipes will make noises, the furnace heating and cooling will expand and contract.

A note: when working in Vegas, a lady called me out to her house, a noise she said in her toilet kept her awake in her bedroom at night. I listened, I flushed the toilet, I listened, I even called the rep to come out. We looked and searched. I came out five times in a period of two days, to find nothing.

I tried to tell her there's nothing there. She became irritated saying I am saying she's crazy.
I told the client that I'm through with that job, I billed him $240.00 for the overtime and he got a plumber in there, they said the same thing.
They charged him $320.00 for nothing. He finally told her to live with it, pay the bill herself or move. I don't know what happen.

The home could be shifting with the ground soil, expanding and contracting, the water pipes, the furnace, the house itself.

Answer 3

It could be your AC compressor equalizing pressure after it shuts off, especially if it is a scroll. If the discharge check valve in the compressor is faulty then the pressure will feed back through the discharge valve causing the scroll elemnt to wind backwards until the pressure is equalized and this could take up to 15 seconds.

Answer 4

Check your drainge system first ,the water may blocked inside pipe & make noise while in release position.

Answer 5

Could be air in your pipes. Maybe you need to bleed your rads