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No, Your Water Heater Isn't Supposed to Make That Noise
No, Your Water Heater Isn't Supposed to Make That Noise
4.8 RATING

No, Your Water Heater Isn't Supposed to Make That Noise

Most homeowners rely on their water heater every single day without giving it much thought-until it starts making strange noises. From rumbling and popping

June 08, 2026
No, Your Water Heater Isn't Supposed to Make That Noise

Most homeowners rely on their water heater every single day without giving it much thought—until it starts making strange noises. From rumbling and popping to hissing and banging, these sounds are more than just a nuisance. They can be waing signs of problems that may require attention from a professional plumber or even a water heater replacement.

Common Noises and What They Mean

1. Rumbling or Popping

If your water heater sounds like it’s boiling or popping popco, mineral buildup may be the culprit. Over time, sediment from hard water collects at the bottom of the tank. When the heating element tus on, water trapped under this sediment boils, creating the rumbling or popping sound. This not only reduces efficiency but also strains the tank.

Our Customers Reviews

Chahib Chakrome

Summit, NJ

The service provided was great, nothing to say about the work of the plumber. 5 stars to him. But the company charges felt way too much for the work. We would have liked to have the same plumber take care of other things in the house, but every time he check how much extra the company will charge for the job, the price just got too much. The plumber did an amazing job he selected a beautiful faucet to replace our old one. He did his best. But the company prices have no room for negotiation.

Tiffany DeSande

Plainfield, NJ

A million stars!!!! Steve and Lucas were absolutely amazing. My parents pipes burst and within 4 hours of calling they came and fixed everything!!! Very nice guys and dealt with my panicking. I will always use them if needed in the future and you all should too!!! Thank god for people like this!!! Thank you so much guys!!!

Naomi Langer-Seltzer

New Brunswick, NJ

We got very quick service, I think the plumber actually arrived in less than an hour! After reviewing what was happening, he gave us our options and performed the option we selected. This happened in the late afternoon or early evening. It was already dark and there was a lot of snow on the ground.

Steve Smith

Mountainside, NJ

I needed immediate, same day service in the early evening at my home. I went to the internet and looked up plumbing services that offered "24-hour, 7-day a week" availability. The first 3 places I called said that they could not get to me until the following day. Then I called Mr. Rooter. They were courteous and promptly got a technician to my house within an hour and a half. The technician, Lucas Kaufmann, was exceptional. The job was not easy, but he figured the problem out and got me all fixed up within an hour's time. Moving forward, I…

Stephanie Brown

Cranford, NJ

Despite what was quite obviously a busy day (day after Thanksgiving at 10pm) TJ came out and did not leave until the job was done! There were several setbacks, which at the late hour might have prompted him to leave- but he chose to stay and continue until the job was complete! I only have one bathroom so I was really hoping he could make it work, and he really did a wonderful job! So thankful for all of his help! I highly recommend TJ!

Shaheen Dhanani

Union, NJ

This is my second time using Mr. Rooter and I have to say they are an excellent company of experienced professionals! The service techs were courteous, experienced and actually spent time trying to figure out the issue before proposing the solution. They were also patient and answered all my questions without rushing the work. I will be using them again.

Christie Murphy

Montgomery, NJ

TJ was amazing! 10/10 recommend this company. We were in an emergency state of panic with a burst pipe in the middle of a bad snowstorm. TJ came with knowledge, professionalism, kindness, and found the root of the problem within five minutes of being here. We will be using him again in the spring to fix an outdoor issue he found!

Alan Abraham

Clark, NJ

The technicians were friendly, professional and knowledgeable. The price was too high I believe, but the technicians had no control over that. The technicians took their time and did a great job. I would use them again and also recommend them.

Amy Swart

Berkeley Heights, NJ

Excellent service! Charles and Nicholas of Mr. Rooter arrived to my scheduled service a few minutes early, wore sanitary shoe coverings, and were extremely professional. They found the source of my leak quickly and fixed the issue. While they here, I requested an additional hydraulic heating inspection which they accommodated. They were very knowledgeable and provided helpful tips. I highly recommend this team and I will definitely call them for all future plumbing needs!!

JACKY Coppola

Wall Township, NJ

TJ came to my aid as the water pipe froze in my house. Although nothing could be done he gave me hints of what could be done my me which was very helpful. I found TJ very professional and caring about my situation. The best part of the very long night was the dogs adored him one wanted to accompany him to his next job. Thank you for employing such an amazing man. Plus today there is water running in the house. Thank you TJ and thank you Mr. Rooney plumbing for employing a man with helpful hints!!!!!

Understanding what these noises mean, and when to call a plumbing repair service, can save you from costly damage and ensure your home continues to enjoy a steady supply of hot water.

2. Hissing or Sizzling

A hissing noise often indicates water is leaking onto the heating element. You may also hear sizzling if condensation drips onto a hot surface. Either way, this is a red flag that calls for immediate inspection by a licensed plumber.

3. Knocking or Hammering

Also known as “water hammer,” this occurs when pipes shift due to sudden pressure changes. While the sound might seem to come from your water heater, the real issue could be your plumbing system. A professional plumbing repair service can install devices to reduce this pressure surge and quiet the noise.

4. High-Pitched Screeching

If you hear screeching, it may mean there’s a valve that isn’t fully open. The restricted flow of water creates the noise. While this may not cause immediate damage, it still requires attention to prevent long-term problems.

Why You Shouldn’t Ignore the Noise

Many homeowners dismiss these sounds as harmless. However, ignoring them can shorten your system’s lifespan and increase utility bills. A water heater working harder due to sediment buildup or leaks consumes more energy and delivers less hot water. In some cases, untreated issues can lead to tank failure, requiring costly water heater replacement.

Addressing the problem early by calling a skilled plumber helps you avoid unexpected breakdowns, costly flooding, or dangerous malfunctions.

When to Consider Water Heater Replacement

Even with the best care, no water heater lasts forever. Most traditional tank-style models last 8–12 years. If your unit is older and making noises, it may be time to invest in a new one. Mode water heaters are more efficient, saving you money on energy bills while providing consistent hot water.

Professional plumbing repair services can help you determine whether your system just needs maintenance or if a full water heater replacement is the smarter choice.

The Role of Preventive Maintenance

Preventive care is the key to avoiding noisy water heaters. Flushing your tank annually removes sediment, while regular inspections catch small leaks before they grow into larger issues. A licensed plumber can also check your anode rod, valves, and thermostat to ensure everything is working as it should.

This routine maintenance not only keeps your system quiet but also extends its life and maintains energy efficiency.

Call the Experts for Peace of Mind

Strange noises from your water heater are your system’s way of asking for help. Whether you need a quick fix, a thorough inspection, or a complete water heater replacement, trust the professionals at Mr. Rooter Plumbing.

Their experienced team provides reliable plumbing repair services that keep your home’s hot water running smoothly. With the right care, you can say goodbye to the clanks, hisses, and bangs for good.

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