Why Is My Water Heater Making A Knocking Noise?

It’s easy to ignore odd sounds coming from your water heater, thinking the problem will resolve itself, but this can be a costly mistake. A minor problem such as a loose component can snowball into a bigger problem that will lead to premature water heater failure. While some knocking sounds might be harmless, it's always better to err on the side of caution and call a trusted plumbing service for assistance.

In this article, we’ll look at some of the common culprits behind the knocking sound in water heaters and what you can do to fix the issue. Here at Rooter Man Plumbing, we take pride in providing professional water heater services, including water heater repair and replacement. When you’re looking for an experienced plumber to inspect your water heater, we are one phone call away.

Sediment Buildup

This is the leading culprit behind knocking sounds in water heaters. Minerals from hard water settle at the tank's bottom, and as the water heater heats, the trapped sediment can cause knocking or popping noises. Fortunately, this is often a DIY fix. You can flush the water heater tank to remove the sediment buildup. If you're not comfortable doing this yourself, consider calling a plumbing repair service for help.

Water Hammer

This occurs when water flow is abruptly stopped or changes direction rapidly in the pipes. This sudden pressure change creates a knocking sound that travels through the pipes and might seem to be coming from the water heater itself. The solution to this problem is to install water hammer arrestors on the pipes near the water heater to absorb the pressure surge and prevent the knocking sound. A plumber can advise on the most suitable solution for your plumbing system.

High Water Pressure

Excessively high water pressure can cause knocking within the water heater or throughout the plumbing system. A pressure regulator valve can be installed on the main water line to reduce pressure to a safe level. It's important to consult a plumbing service to ensure the water pressure remains adequate for your household needs.

Loose Pipes

Loose pipes can vibrate and create a knocking noise. Tightening any loose connections might solve the problem. However, be cautious not to overtighten, which could damage the pipes. If you’re not confident in your DIY skills, it's advisable to consult a plumber for this task.

Faulty Heating Element

A failing heating element is less likely to cause a knocking sound, but it's a possibility. If you suspect a faulty element, it's best to call a plumber for diagnosis and replacement. The common signs of a faulty heating element include:

• Reduced hot water
• Fluctuating water temperature
• Higher energy bills
• Tripped circuit breaker

Call Rooter Man Plumbing For Water Heater Repair

Is your water heating making unusual, loud noises? Does your hot water temperature keep going up and down? Call Rooter Man Plumbing for professional water heater repair or replacement. We’ve built a longstanding reputation for offering top-notch water heater services that are backed by a 100% satisfaction guarantee.