Hi, We recently had a plumber out to put a pressure reducer on our water. He also had to fix part of a shower install that our ex contractor had his dry wall guy do. The water was turned off to our house while the plumber did the repairs. Since then there has been a ticking sound in our pipes. I have read that air gets in there and you have to turn the water off and prime it somehow... Should this fix my problem? Could it be from the pressure reducer? Thanks!