Reply To: knocking-banging when cold water turned off Home › Forums › Public Forums › General Plumbing › knocking-banging when cold water turned off › Reply To: knocking-banging when cold water turned off 24 Apr 2003 at 10:43 am #294337 Retired plbg1Participant You probably have high press. and need a Pressure reducing valve installed in the line, also there might not be any air chambers on the fixtures so install a shock absorber in the line too.
