OK Gurus, It's been awhile since I have posted on the site, but I have a client in SW Florida, who gets awfull noise when his #1 and #3 sprinkler valves are running. Only those two out of five total cause the noise in his copper house water line. Has an above ground sprinkler valve manifold, 1" Irritrol 205 vlaves with flow controls, so I assumed his #1 and #3 lateral sprinkler lines (1") were laying across his copper water house line underground, as adjustments to the flow controls on the valves did nothing to repair the noise problem. Dug it up and they are 4" above his water line, which is pvc until it gets to the house, and then rises in 1/2" copper. When you hold the copper house line while zones 1 or 3 run on the irrigation, it vibrates quite bad, then resonates in the house making a bunch of noise inside. His copper house lines are clamped to the floor joists in a crawl space under his floor. So, any ideas what could be causing this vibration and noise in his house copper lines, when only two different sprinkler valves run? When I searched the posts on these issues they were 5-7 years old and none addressed this type of problem specifically. Thanks, any ideas would be appreciated!!! I'm stumped!!