Why is my home's plumbing making groaning and honking noises?

You may want to check to see if a toilet is leaking. Check the water level in the tank to see if water is overflowing into the overflow pipe. This is the pipe in the middle of the tank that has a small tube connected to it. If water is running into the overflow pipe, adjust the fill valve to stop the flow approximately 1 inch below the top of the overflow tube or to the water level mark stamped on the side of the tank. Periodic maintenance by a plumbing professional will ensure proper operation.It could be that you have lost your “air cushion.” To get it back, turn the water supply off at the main valve. Turn on all the faucets around your home. Then, turn on the main valve again and shut off each faucet. This should take care of the problem.