Just to be thorough I'm going to list the chain of events:water pressure regulator was doing a slow leak for monthsbought a new one and handy man installed it on backwardswent a week with crazy high pressure not knowing whyhired plumber who figured out regulator was on backwards and took it off and put it on correctlysince then, water pressure is back to normal BUT loud groaning noises whenever any water is usedfiddled with regulator and turned it counter clockwise in hopes of lowering pressure, no change in groaning noisescalled plumber, he said to turn off the toilets one by one to isolate which one is causing the noisesall toilets are off but water use from any sink still causes loud groaning noisesany suggestions other than getting the plumber over again? via /r/DIY https://ift.tt/2RmZZ9q
