PROBLEM: Noisy Pipes
- Faulty circulator
- Water trapped in return lines
- Check the circulator. There is a spring loaded coupling that connects the pump to the motor. When it breaks after the pump jams, the coupling will make a loud noise as the motor runs.
- Check that the pitch of the return lines slope back toward the boiler. Adjust pitch with new pipe hangers if necessary.
- Adjust pitch of radiator with a shim so that it slopes back toward the return pipe.