Water Hammering Sound

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Water Hammering Sound

Water lines should maintain about 60 psi of water pressure at all time. If the pressure is too high it can create different kinds of noises like Banging, Knocking, Whistling, Humming, Chattering, Rattling, Clunking and Clanging.These types of sounds are called “water hammer”.

If these sounds occur while water is running and then stops by itself, it is a good indication that you have a leak problem on your toilet tank-to-bowl and not necessarily a water hammer. Installing a water hammer arrester (air chamber) may eliminate the banging sound associated with sudden water flow stoppage such as a dishwasher, a clothes washer, a toilet or even shutting off a hand faucet suddenly. Shutting off the flow suddenly sends a pressure or shock wave down the water line through the water which “shocks” the pipes and creates the ‘hammer’ noise. These shock waves travel faster than the speed of sound and can exert very high instantaneous pressure. Over time, water hammer can damage pipes, valves and eventually weaken pipe joints.

When you hear a sound coming from a single fixture such as a faucet, toilet, or stop angle valve, it might be a problem with bad washers. In order to fix these problems, try to repair or replace the faucet stem washer or seat first. In the case of a toilet, you can replace the water supply line and ball cock first. After repair of these you can check or replace stop angle valves. By following these steps it should take care of most knocking sound problems. When you hear a sound from two or more fixtures it may be two different kinds of problems. First is a high water pressure problem which can damage your faucets, toilet valves, water heaters and other devices connected to the plumbing. Most plumbing devices are designed for approximately 65 psi of pressure. Drain Doctor offers to all of our customers a Free Visual Inspection Service. As a part of this service you have a right to ask our Technician to check your Water Pressure Regulator. If your pressure is above 65 psi, you may want to adjust your pressure regulator or install one if you don’t have one already. The second reason for these types of problems is how your plumbing lines are routed inside the walls and under the floors and whether they have been secured correctly. Improperly strapped pipes or dangling and/or loose pipes can lead to noises in the plumbing system.

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