Your household uses hot water daily for grooming, washing dishes, cleaning clothes, and other essential activities. While you might not hear your hot water heater much, a loud, uncommon knocking sound should cause concern.
In the short guide below, our team at Roto-Rooter Plumbers in greater Cedar City, UT, explain why water heaters make knocking noises and what you can do about it.
Reasons Gas and Electric Water Heaters Produce Knocking Sounds
A water heater tank may occasionally make small knocking sounds as the warmth from the heating elements causes the tank to expand. However, loud, persistent knocking likely means you need your water heater repaired.
The most common reason a hot water heater knocks loudly surrounds the sediment build-up from hard water. The minerals in your water supply will accumulate inside the tank, forming scale.
The scale reduces the volume inside the water heater. Steam bubbles stay inside the appliance as the heating element warms the water. The excessive knocking noise is the steam bubbles bouncing around the tank.
If the sediment buildup becomes excessive, your water heater could develop rust and additional damage, resulting in the need for professional repairs or a new water heater.
Warning signs of a sediment problem in a water heater include:
- Cold water from a hot water tap
- Not enough hot water
- Rust-colored water
- Foul odor
Some of these symptoms can indicate other problems, like a blown pilot light or a tripped circuit breaker. It’s best to seek professional water heater repair to uncover the root of the equipment’s problem.
Hot Water Heater Repair Tips To Stop Knocking Noises
Follow these maintenance tips to extend the life of your gas or electric water heater.
Install a New Temperature Pressure Relief Valve
Your water heater might need a new pressure relief valve installed to manage the equipment’s water temperature. It can sometimes malfunction, causing temperatures to spike. The excessively high heat will cause the water heater to make knocking sounds.
Secure Anode Rod Replacement
The metal component that prevents a water heater from rusting and corrosion is the anode rod. You must replace it if it stops working.
Flush Hot Water Heater
Occasionally, you need to flush your water heater to eliminate sediment. The simplified steps of this process include:
- Turn off the fuel source
- Shut off the cold water tap
- Drain the tank
- Flush the system
The process is relatively straightforward but can be difficult if you lack experience. So contact a plumber for the best results.
Count on Roto-Rooter Cedar City, UT, for the Best Water Heater Repairs
For reliable water heater repair, trust Roto-Rooter in greater Cedar City, UT & Iron County. As a skilled, experienced, and certified residential and commercial plumbing company, our technicians have the expertise to handle everything from water heater installation to leak repair. Our professional plumbers also offer drain cleaning, zero-dig pipe restoration, hydro jetting, water damage restoration, and more, making us the go-to plumbing service for Cedar City, Utah, and nearby communities.
When you need an emergency plumber, help with frozen pipes, or replacement parts for your water heater, contact Roto-Rooter Cedar City, UT in Iron County
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1. Roto-Rooter is recognized as one of America’s very top plumbing brands.
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