Omnia Mechanical Group

571 Timpson Place Bronx, NY 10455

Phone: 212-534-2500

Contact us on email!

Why Does My Water Heater Make Noise?

Why does my water heater make noise? It’s a common enough question but not specific enough to diagnose a cause. In general, water heaters and all mechanical devices make some noise, although most are quiet. People often question the noises produced when they are strange or out of the ordinary, like hissing, popping, or rumbling sounds.

Sometimes, the sounds you hear are harmless, but other times, they can indicate a need for maintenance or cleaning. Discover the most common causes of strange noises from your water heater and when they are cause for concern.

Why My Water Heater is Making Noise: 6 Common Causes

1. Sediment Buildup

Sediment buildup is the most common cause of water heater noises. It can produce popping or crackling sounds from bubbles trapped under the sediment or rumbling and banging because of overheating because of sediment insulation.

Hard water, with its high concentration of minerals such as calcium and magnesium, is a significant contributor to sediment buildup. As the water heats up, the minerals form solid particles that settle at the bottom of the tank. Over time, the sediment layer grows thicker, creating an additional insulating or barrier layer between the heating element and the water.

Sediment buildup leads to overheating, reduced capacity, and higher energy bills. To avoid the noises and problems associated with the issue, contact Calray Boilers for tank flushing. Periodic flushing of the water heater can remove accumulated sediment. If the problem is severe, you may need to invest in descaling products.

A single tank flush is likely not enough for severe sediment buildup to eliminate the noises or all the sediment. Regular tank flushing is beneficial in severe situations and as a preventative, especially if your property has hard water.

2. Faulty or Loose Valves

Water heaters have several valves that play an integral role in maintaining water pressure and temperature. Your water heater might make noise because of a faulty or loose valve. Problem valves can cause several noises, from ticking to whistling. Each noise can hint at the potential problem valve, but you still need an expert to diagnose the issue.

Ticking and tapping noises are the most common noises associated with valve problems. With loose or malfunctioning valves, the change in water pressure as they open and close can cause a repetitive ticking or tapping sound, which is usually louder the closer you get to the problem valve.

A whistling or screeching sound usually indicates restricted water flow through the valve. Flow issues can have many causes, but they are likely caused by sediment, age, or wear and tear.

Depending on the cause of the faulty or loose valve, it likely needs to be replaced. The cost for the replacement depends on the type of valve. For example, a gas valve replacement can cost between $150 and $550. Contact Calray Boilers for a more specific estimate.

3. Leaks

Leaks can cause a water heater to make noise. Even small leaks in or around your water heater can cause noticeable sounds, like hissing or dripping. Leaks always require immediate attention. They typically signal more severe problems, such as wastewater, and potentially create unsafe conditions.

A hissing or sizzling sound usually indicates a tank leak. The sound stems from water dripping onto the hot gas or electric heating element. The problem with this type of leak, especially when it is slow, is that the water quickly evaporates, leaving little evidence of the damage.

A dripping or tapping sound can indicate a leak from a valve or pipe leading from the water heater. Depending on the severity, building owners or staff may notice pooling before they notice the noise.

Leaks require immediate and professional attention. The issue wastes resources, but it also presents safety and system hazards. Depending on the severity of the leak and the system’s heating source, a leak can create electrocution and shock risks. If the leak is a long-term problem, it can cause significant corrosion around the water heater and its components.

4. Loose Straps and Surges in Water Flow

Other common culprits for your water heater’s noise are loose straps and surges in water pressure. Pipe straps secure water pipes to walls or other structures to minimize vibrations and movement. Over time, these straps can loosen because of the subtle vibrations from the water heater’s operation. When the straps loosen, they allow the pipes more freedom, which usually results in clanging, rattling, or knocking sounds when water is running.

Severe or significant changes in water pressure can also produce knocking or banging sounds. Water hammer occurs when the opening or closing of a fixture or valve creates a sudden and powerful pressure surge. The surge sends a shockwave through the pipes, resulting in violent shaking and collisions with walls, straps, and other pipes. To resolve water hammer and pressure issues, you likely need a pressure regulator or system arrestors, which act as shock absorbers.

5. Failing Heating Element

Another potential cause of your water heater’s noise is a failing electrical heating element. In the best cases, a heating element can last the water heater’s lifespan, typically 10-15 years. That said, mineral buildup, corrosion, and internal damage can all reduce the life expectancy of the heating element and the system.

Electric water heaters rely on one or two heating elements submerged in water. These elements may cause noises when overheated or damaged. The most common noises include buzzing and humming, typically caused by erratic electrical flow, or sizzling and crackling, caused by water interacting with a scorching hot surface.

Why Does My Water Heater Make Noise, and How Can I Get It to Stop?

Call Calray Boilers

Why does your water heater make noise? The answer depends on the situation. Calray Boilers can inspect your water heater and assess the noises to determine the underlying cause of the problem. Depending on the severity of the problem, you might need a new unit. To avoid future problems, call our team at 212-722-5506 to ask about our annual service contracts, which include regular maintenance and inspections.

Our Privacy Policy

Omnia Mechanical Group(the “Company”) strives to ensure the highest standards for property listings and customer information privacy. Please review the following statement to learn about our company practices and policies. Please be aware that our Privacy Policy is subject to change at any time.

1. Purpose.

This Privacy Policy (“the Policy”) provides information on how the Company uses your personal information. By agreeing to the Policy, you agree to our collection and use of your personal information as described in the Policy. This Privacy Policy is effective for all new users of

2. Personal Information.

You can browse some areas of (“the Website”) without being a registered user. However, certain activities do require registration. (You consent to the transfer and storage of your information by registering with

3. Use of Information.

Our primary purpose in collecting personal information is to provide you with a safe and user-friendly experience. For example, the Company may use your personal information to:

  • Improve our services and the Website’s content and layout;
  • Provide the services and necessary customer support you request;
  • Resolve disputes, collect fees, and troubleshoot problems;
  • Track and record customer satisfaction with our services;
  • Protect the Company against error and fraud;
  • Inform you of special promotions and announcements;
  • Enforce our agreements, terms, conditions, and policies; and
  • As otherwise described to you at the time of collection.

We may occasionally ask you to complete optional surveys. These surveys are used to improve and customize your experience with

The Company always provides you the ability to opt-out of further communication such as promotions and surveys; see the Opt-Out section below.

The Company does not share any of your personal information with outside organizations, companies, individuals, etc. The only exception to this standard is if such a disclosure is reasonably necessary to respond to any and all legal processes.

4. Links to Other Sites.

The Website may have links to other websites that may collect personally identifiable information about you. The Company is not responsible for the privacy practices of the content of those linked websites.

5. Safety & Security Precautions.

The Website has strict security measures in place to protect you and your information from fraud. Once your information is provided to Omnia Mechanical Group, we strive to ensure the confidentiality of your identity and information.

6. Opt-Out.

The Company provides you with the opportunity to opt-out of receiving promotional and other non-essential, marketing-related communications from Omnia Mechanical Group. If you would like to opt-out of these select communications, please see any of the Company’s email communications and follow the directions indicated.

7. Account Protection.

Your password ensures the security of your account. When choosing a password, the Company suggests using various characters. It is highly recommended that you do not disclose your password to anyone. (If you do disclose your password or your personal information with others, you are responsible for all actions taken in the name of your account.) If the security of your password is compromised for any reason, please contact the Company immediately.

8. Accuracy of Information

The Company does not guarantee the accuracy of information for any and all of its properties on the Website, and is not responsible for any errors or misrepresentations (made by Renters, the Client, or otherwise).

9. Cookies

The Company may place a small cookie on your computer’s hard drive. This allows us to personalize your use on the Website. In order to maximize the functionality and usability of the Website, you must set your browser’s preferences to allow both permanent and temporary cookies.

10. Changing Your Personal Information.

Should your personal information change, please immediately update your information on the Website. This will ensure the accuracy of our records. The Company does retain personal information from closed accounts in order to comply with law and collect and disburse any fees owed.

11. Third Parties

This Privacy Policy addresses only the use of information we collect from you. Since does not control the privacy policies of third parties, you are subject to the privacy policies of those third parties. It is advisable that you consult with the management of third parties before you disclose your personal information to others.

12. General

We may amend this Privacy Policy at any time by posting the amended terms on the Website. All amended terms are immediately effective after they are initially posted on the Website.

13. Privacy Policy Questions & Concerns

Questions and/or concerns regarding the Policy should be emailed to the following email address: