When a faucet, valve, or appliance that uses water shuts off abruptly, the pressure inside the unit can increase as the water seeks a place to go. A banging or knocking sound, not unlike a hammer, will often result, which is where this common plumbing issue gets its name. Below is an introduction to water hammer and what can be done to remedy it.

Causes

There are several plumbing problems that might cause the pressure fluctuations needed to create a water hammer. One of the most prevalent is water in the air chamber. Air chambers are pipes that regulate air pressure so that water does not collect in the pipes that supply it. These chambers can be reset to rebalance the pressure and get rid of the water hammer.

Another possible cause is high water pressure throughout your home. Plumbing systems have settings, and when they are set at higher thresholds, it can upset the pressure balance in your pipes. With high water pressure, you may hear it frequently and not only when certain faucets are turned off.

A major appliance that utilizes a lot of water can be the source of a water hammer as well. Washing machines, dishwashers, and sprinkler systems each require great amounts of water each time they're used. The demand on your plumbing system upends the pressure balance and produces a water hammer; if you hear knocking or banging only when a certain large appliance is used, that appliance is likely the cause of the issue.

Remedies

The remedy to your water hammer issue will depend on the exact cause. If there is water in the air chamber, shut off your water supply, open all faucets and valves, and let the water completely empty out. Then, reengage the main supply; this resets the chambers.

For high water pressure in the home, lower the settings on your plumbing system. If a major appliance is the culprit, you can have a water hammer arrestor installed by a plumbing professional. This device prevents water hammers from occurring. It provides a cushion of air to absorb the impact of increased air pressure within your pipes.

Understanding some basics of water hammers will lead you to the right fix. The plumbing professionals at Osterwisch Company are here to help. Since 1946, they have been serving property owners throughout the Cincinnati, OH, and Tri-State areas. In addition to plumbing repair, they also offer heating and cooling and electrical contractor services. Call (513) 791-3282 or visit their website to schedule an appointment or request an estimate.