Water hammer is a pipes noise created when a quick shutoff valve closes and the water pressure slams into the valve, creating a banging noise. There are a couple of approaches to eliminating water hammer noise, like installing air chambers or mechanical water hammer arresters. While an arrester is seen as a more effective alternative, it is much less expensive to install air chambers in accord with every shutoff valve to help address the problem.
Turn off the water source to the home, and turn on a tap in the bottom level of the construction to eliminate water pressure into the pipes.
Eliminate the plumbing fixture in which the water hammering is occurring. Cut out the drywall around the water supply valves to acquire access to the pipes in the wall.
Loosen the coupler on the water supply valve utilizing an adjustable wrench, then slide the valve, then ferrule and coupler off of the copper pipe. Establish the bits aside.
Heating the elbow joint for the sink or toilet supply line in which the elbow turns to guide the feed into the room using a butane or propane torch, and slide the elbow off of the copper tube. Sand the end of the exposed pipe using emery paper to eliminate any remaining solder or burrs.
Apply paste flux into the end of the exposed pipe as well as to a single side of a matching copper T. Position the T over the pipe, with one remaining side of the T extending upwards and the other toward the room for the water supply valve. Hold the fire of the torch against the joint and place the tip of a solder wire on the joint. Melt the solder around the joint to connect the two pieces together and seal the joint.
Cut an 18-inch part of copper pipe matching the diameter of the copper pipe in the wall using a tubing cutter. Wash any burrs from every end of the pipe, then apply flux to a single end of the copper pipe and also to the interior of a copper end cap of the exact same diameter as the pipe. Solder the cap into the pipe with hardened wire and the torch.
Apply flux to the opposite end of the pipe together with the top leg of the T. Insert the pipe into the top leg of the T. Solder the pipe into the T to function as an air place.
Measure and cut a brief piece of copper tubing to connect the horizontal leg of the T into the water supply valve in the room. Clean out the tubing with emery paper, then apply flux to a single end of the brief piece of pipe and also to the open leg of the T. Combine the two bits and solder them together.
Position the coupler and ferrule over the end of the exposed copper pipe, then attach the water supply valve to the end of the pipe. Slide the compression ferrule toward the end of the pipe and tighten the coupler with an adjustable wrench to secure the water supply valve.
Turn the water source to the home and check the air chamber and connected pipes for leaks. Place a bucket beneath the water supply valve and turn the water, then immediately turn it off to test for water shake after the addition of the air chamber.