Shower Pump Making Noise? Here’s What’s Causing It and How to Fix It

A shower pump should boost your water pressure — not fill your bathroom with rattling, humming, or grinding sounds. If yours gets loud during use, it’s usually a sign of vibration, worn parts, or issues like cavitation. In this guide, we break down the most common shower pump noise problems that occur while the pump is running and show you how to fix them, so you can get back to a quiet, powerful shower.

If your pump is making noise when no water is running, see our guide on shower pump making noise when not in use.

Understanding Shower Pumps

Before diving into the noise issues, let’s briefly understand what a shower pump is and how it works. It is a device designed to increase water pressure in your plumbing system. This is especially helpful in homes where the water pressure from the mains supply is insufficient for a satisfying shower experience. They are typically installed near the hot and cold water supply and work by drawing water from these sources and pushing it through the showerhead at a higher pressure.

While shower pumps perform a crucial role in enhancing your shower experience, they can sometimes be the source of unwanted noise, leading to frustration for homeowners.

Common Causes of Shower Pump Noise

1. Air Trapped in the System: One of the most common causes of noise in the pump is the presence of air trapped in the pipes. When air gets into the plumbing system, it can create a gurgling or sputtering sound as water tries to flow through. This noise can be particularly noticeable during the initial stages of showering when the pump is activated.
2. Vibration and Mounting Issues: Shower pumps can vibrate during operation, especially if they are not installed correctly. If the pump is not securely fastened to a stable surface, it may move or wobble while running, causing excessive noise. Loose fittings or incorrect mounting can exacerbate this problem.
3. Worn Out or Damaged Components: Over time, various components of a shower pump can wear out or become damaged. This includes parts like bearings, impellers, or seals. If any of these components are not functioning properly, they can lead to unusual sounds during operation, such as grinding, rattling, or whirring.
4. Cavitation: Cavitation occurs when the pressure in the shower pump drops too low, causing the liquid to vaporize and form bubbles. When these bubbles collapse, they produce a loud, knocking noise. Cavitation can be caused by various factors, including incorrect pump sizing or installation.
5. Water Hammer: Water hammer is another noise issue that can affect the pumps. It occurs when water flow is suddenly stopped or changes direction, causing a shockwave that creates a loud banging noise. This issue is often associated with poorly installed or unsupported pipes.

Solutions to Reduce Shower Pump Noise

Now that we have identified the common causes of shower-pump noise, let’s discuss some effective solutions to mitigate these issues.

1. Bleed the System: If you suspect that air is trapped in your shower pump system, the first step is to bleed the system. This can be done by running the shower for a few minutes while allowing water to flow freely. This process helps to push out trapped air, reducing gurgling or sputtering sounds.
2. Secure the Pump Properly: To minimize vibrations and movement, it is essential to ensure that your shower pump is properly secured. Make sure that the pump is mounted on a solid base and that all fittings are tightened. If necessary, use rubber mounts or pads to absorb vibrations and reduce noise.
3. Replace Worn or Damaged Parts: If your shower pump is making unusual noises, it may be time to inspect its components. Check for any signs of wear or damage, such as frayed seals or worn bearings. If you notice any issues, consider replacing the affected parts to restore the shower pump’s quiet operation.
4. Address Cavitation: To prevent cavitation, ensure that your shower pump is appropriately sized for your plumbing system. If the pump is too small or undersized, it will struggle to maintain adequate pressure, leading to cavitation. Consult with a professional to assess your pump’s specifications and make any necessary adjustments.
5. Install Water Hammer Arrestors: If you experience water hammer noise when using your shower pump, consider installing water hammer arrestors. These devices are designed to absorb shockwaves in the plumbing system and can significantly reduce the banging noise associated with water hammers.
6. Regular Maintenance: Regular maintenance is key to keeping your shower pump running smoothly and quietly. Schedule routine checks to ensure that all components are functioning properly and that there are no leaks or blockages in the system. A well-maintained shower pump is less likely to produce noise.

When to Seek Professional Help

While some noise issues can be resolved with simple DIY solutions, others may require professional assistance. If you have tried the above solutions and your shower pump is still noisy, it may be time to call in an expert. A qualified plumber can diagnose the problem accurately and recommend the best course of action.

Additionally, if you are not comfortable performing maintenance tasks or if your pump is old and showing signs of wear, seeking professional help can save you time and prevent further damage.

Conclusion

Dealing with a noisy pump can be frustrating, but understanding the causes and implementing the right solutions can help restore peace to your bathing experience. By addressing issues such as trapped air, vibrations, worn components, and water hammer, you can significantly reduce noise levels and enjoy a more pleasant shower.

Remember that regular maintenance is essential for the longevity and performance of your pump. Whether you are a DIY enthusiast or prefer to leave it to the professionals, ensuring that your shower pump operates quietly will enhance your overall bathing experience. If you encounter persistent noise issues, don’t hesitate to reach out for professional assistance. A quiet shower is just a few steps away!

About Dublin Shower Pumps

At Dublin Shower Pumps, we have over 23 years of experience in providing top-notch installation and replacement services for shower pumps. Our team of experts is dedicated to ensuring that your shower pump operates efficiently and quietly, enhancing your overall bathing experience. If you are facing noise issues or need assistance with shower pump installation or replacement, contact us today!