: Am changing out the piping in my house from galvinize to coppert. Have found watering hammering stubs on most of outlets.
: Would like info on reason for these and specs, size, length, etc..alvin shimogaki

Alvin,
The link below has water hammer info. The new way, is to add mini-resters at any quick closing valve. Those would be dishwasher, clothes washer, ice-maker, and you can add them on shower valves. Although many of the new pressure balanced shower valves are pretty slow closing. Terry