Water Pipes Banging When Sprinkler System is On? Here’s What You Need to Know

If you’ve ever heard loud banging noises coming from your water pipes when your sprinkler system is on, you might be dealing with a common plumbing issue known as water hammer. This phenomenon can be both annoying and damaging to your plumbing system. In this article, we’ll explore the causes of water hammer, how to diagnose it, and effective solutions to prevent it. We’ll also provide useful interlinks and outbound links to credible sources and videos to help you understand and tackle this issue effectively.

What is Water Hammer?

Water hammer, or hydraulic shock, occurs when a sudden change in water flow causes a shockwave within the pipes. This shockwave produces a banging noise and can lead to significant damage over time, including burst pipes and damaged fixtures.

For a visual explanation, check out this video on Understanding Water Hammer and Its Effects.

Causes of Water Hammer in Sprinkler Systems

Several factors can contribute to water hammer in sprinkler systems:

  1. Fast-Closing Valves: Sprinkler systems often use solenoid valves that close quickly, causing a sudden stop in water flow and creating a pressure surge.\
  1. High Water Pressure: Excessively high water pressure can exacerbate the effects of water hammer.
  1. Long Pipe Runs: Long lengths of piping can amplify the shockwave created by sudden changes in water flow.

For more details on the causes and effects of water hammer, you can refer to this comprehensive guide.

Diagnosing Water Hammer

To diagnose water hammer, listen for the distinctive banging noise when your sprinkler system is in operation. Check if the noise occurs immediately after the sprinkler shuts off. Additionally, inspect your pipes for any visible signs of damage or wear.

For a more detailed walkthrough, watch this helpful video on diagnosing water hammer.

Solutions to Prevent Water Hammer

Fortunately, there are several effective solutions to prevent water hammer in your sprinkler system:

  1. Install Water Hammer Arrestors: These devices absorb the shockwave created by sudden changes in water flow, preventing the banging noise and protecting your pipes. For high-quality options, consider Water Hammer Arrestors – Binex.
  1. Reduce Water Pressure: Installing a pressure regulator can help maintain a consistent water pressure, reducing the likelihood of water hammer.
  2. Use Slow-Closing Valves: Replacing fast-closing solenoid valves with slower-closing alternatives can help minimize the shockwave effect.

Additional Tips

  • Pipe Insulation: Insulating your pipes can help dampen the noise caused by water hammer.
  • Secure Loose Pipes: Ensure that all pipes are securely fastened to prevent movement and reduce noise.

For further reading on preventing plumbing issues, check out this article on common plumbing problems and solutions.


Water hammer can be a significant issue in sprinkler systems, but with the right knowledge and tools, it can be effectively managed. By installing water hammer arrestors, reducing water pressure, and using slow-closing valves, you can protect your plumbing system and enjoy a quieter home environment.

By taking these steps, you can prevent water hammer and ensure the longevity and reliability of your sprinkler system.

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