||12-31-2006 09:46 AM
We own a 2 story colonial with copper plumbing. When the water faucets are turned off a terrible water hammer occurs. There are water hammer arresters on the hot and cold under the kitchen sink and under the first floor laundry tub. I have drained the entire house water system by shutting off the main valve to the house, and opening up the highest faucet and the lowest faucet. After I "refill" the house plumbing the hammer goes away. But then after a few weeks, the hammer slowly returns. What do I have to do next? It sounds like the whole house is coming undone when the pipes shake.