How to Prevent and Fix Laundry Water Hammer Noise

by

Water hammer noise in your laundry system can be disruptive and may indicate a plumbing issue. Understanding how to prevent and fix this problem can save you time and money, and ensure your laundry area operates smoothly.

What Is Laundry Water Hammer?

Water hammer is a loud banging or thumping noise caused by sudden changes in water flow within your pipes. When a valve closes quickly or water flow is abruptly stopped, pressure waves travel through the pipes, creating the noise. In laundry areas, this often occurs when the washing machine’s water inlet valves shut off suddenly.

Preventing Water Hammer in Your Laundry System

  • Install Water Hammer Arrestors: These devices absorb pressure surges and prevent noise. They are especially effective near washing machines.
  • Secure Loose Pipes: Ensure all pipes are properly fastened to prevent movement that can amplify water hammer sounds.
  • Adjust Water Pressure: High water pressure increases the likelihood of water hammer. Use a pressure regulator to keep pressure within safe limits (usually 40-60 psi).
  • Use Slow-Closing Valves: Replace quick-closing valves with ones that close gradually, reducing pressure shocks.
  • Maintain Proper Pipe Slope: Ensure pipes are correctly sloped to allow smooth water flow and reduce pressure buildup.

Fixing Water Hammer Noise

If you already experience water hammer, here are steps to fix it:

  • Install or Replace Water Hammer Arrestors: Place them near the washing machine or at the point of highest pressure.
  • Secure and Support Pipes: Use pipe clamps and straps to prevent movement and reduce noise.
  • Reduce Water Pressure: Adjust your home’s pressure regulator to lower the pressure if it’s too high.
  • Replace Quick-Closing Valves: Switch to slow-closing valves to minimize pressure shocks.
  • Call a Professional Plumber: If the noise persists, a plumber can diagnose and resolve complex issues effectively.

Conclusion

Preventing and fixing laundry water hammer noise involves proper installation, regular maintenance, and sometimes professional assistance. By taking these steps, you can enjoy a quieter, more efficient laundry experience and protect your plumbing system from potential damage.