If you hear a loud bang coming from your plumbing, it’s probably due to a phenomenon known as water hammer. This is a common problem that plumbers deal with, and understanding more about it will help you know when to call a professional. The following guide provides more information about how to identify and address water hammer.

A Brief Guide to Water Hammer

What are the causes?

When the water in your pipes suddenly changes direction, or the flow is stopped, a shock wave is created that causes water to surge and knock against pipe walls. This causes banging in the plumbing and the surrounding components.

The sudden change can happen when water pressure in the house is too high, or a faucet, appliance, or valve is abruptly turned off. Water hammer is also known as hydraulic shock.

How is the problem fixed?

Plumbers often use an air chamber to deal with water hammer. They install a piece of vertical piping that’s empty except for air. This acts as a cushion that absorbs shock waves and water surges.

Air chambers can sometimes fill with water, causing the surges. A plumber will have to drain these areas by turning off the water and draining all faucets and valves around the home. Another solution is to use a water hammer arrestor, which has a piston that absorbs the pressure changes.

How can it be prevented?

The best way to prevent hammers is to ensure that your home’s water pressure isn’t too high. You can check the pressure using a gauge. Turn off faucets and appliances, and attach the gauge to a valve. Slowly open the tap and wait until the gauge needle stops moving. If it reads above 75 pounds per square inch (psi), have a pressure regulator installed by a plumber.

Should I be worried?

Water hammer isn’t a serious problem, and the loud banging is typically the only consequence. If they happen repeatedly or are very large, the pipes could shake loose from their mounts or become damaged, creating a leak. If you think your plumbing is experiencing hammers, check the water pressure, and contact a plumber to prevent future issues. 

When you need a plumber to deal with water hammer, turn to Disponette Service Co. Inc. in Lexington, KY. This family-owned company has been in business for over 40 years. They are also trained and equipped to handle residential and commercial HVAC systems. This fully licensed, bonded, and insured company has had an A+ rating with the Better Business Bureau® since 1991. Call (859) 255-7157 to speak to a friendly team member, or visit them online to find out more.