Q: Every time I turn off the water faucet in my laundry room, it sounds like someone is banging on the wall. Is my house possessed by evil spirits? Please help; the noise is frightening my kids. A: ...

In other words, water hammer arresters are now required -- they are no longer a mere suggestion. You'll most commonly find "quick-acting valves" on dishwashers and clothes washing machines. Also, the ...