I recently changed the water hoses on my clothes washer from the all-rubber type to a new style with a braided-metal covering. The next time I used the washer, a loud bang resounded when the water turned off. The all-rubber hose is much more expandable than the metal type. Being more expandable, the rubber type dampens the pressure surges that cause water hammer.
At the hardware store, I bought a couple of water-hammer dampers, 4-in. lengths of copper tubing closed at one end and threaded on the other. Inside, an air chamber dampens pressure surges. The instructions said to cut into the copper water lines and to solder in T-fittings to mount the dampers. I figured out a way to avoid that step.
At each faucet, I installed Y-hose fittings. Next, I attached a female hose thread to a female pipe-thread coupling on each Y-fitting, followed by a water-hammer damper threaded into each coupling. This solved the problem. The copper tubes will likely fill with water over time. When that happens, I’ll unthread them, pour out the water, and reinstall them.
Robert Tata, Huron, OH