Jul 24, 2012, 08:10 AM
I have a lawn sprinkler system 3 zones that in summer run in total approximately 1 hour. The system is scheduled to run at 5:00 a.m. When I go to shower after the system has water or use any hot water supply the water runs slowly for a few seconds then I hear a pop sound and then it runs normal. Itís as if thereís an air bubble in the line. This only happens after using the lawn sprinklers no other water source. Iíve already installed a an anti-pipe knock devise in the sprinkler line and a pressure regulator in the water main line set at 60-65 lbs. Anyone know whatís causing the problem with the hot water line?