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Water Hammer in Sprinkler Systems

In a sprinkler system, water hammer can occur when valves open or close quickly, causing rapid changes in water flow. Over time, repeated water hammer events can damage the piping, fittings, or even the sprinkler heads themselves. Luckily, you can mitigate these effects with a water hammer arrestor. During a surge event, your sprinkler system’s water hammer arrestor absorbs the shock wave, preventing it from transmitting through the piping system.

Learn about Water Hammer

If you're not sure what water hammer is or if you should purchase a water hammer arrestor, Sprinkler Warehouse's tutorials have the answers! Water hammer is often confused with air in the pipes. Knowing the difference is essential to help protect your irrigation pipes and find the best solutions to your repair problems. We offer the best solutions and troubleshooting methods to fixing both water hammer and air in the pipes.

Learn How to Install a Water Hammer Arrestor in Your Irrigation System

If you know you need a water hammer arrestor but you're not sure how to install it, Sprinkler Warehouse is here to help. We offer a combination of article and video tutorials to teach you about water hammers as well as how to install them in your system. Typically you will install these devices upstream of the zone control valves or a manifold. If a valve is a smaller size than the pipe, then there is a chance that the valve is the problem.

Shop Water Hammer Arrestors at Sprinkler Warehouse

A water hammer arrestor can be the perfect solution for your irrigation pipe problems! Sprinkler Warehouse offers two sizes to best fit your commercial and industrial water lines. These water hammer arrestors are used to absorb the shock when water flowing in a piping system suddenly stops due to fast closing shutoff valves and can be purchased here at Sprinkler Warehouse online or in our showroom.

Top 4 Benefits of Water Hammer Arrestors

  1. Stop banging in pipes
  2. Absorb shock from valve shutoffs
  3. Protection against damage
  4. Help prevent erosion from water hammer

Water Hammer Arrestor Related Searches

Water Hammer Arrestor Tutorials

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Water Hammer Arrestor FAQs

What is water hammer, and why is it a problem?

Water hammer is a pressure surge or shock wave caused by the sudden stopping or change in flow of water in a piping system. It can cause loud banging noises, pipe vibrations, and eventually damage to the surrounding valves and fittings. A water hammer arrestor absorbs the energy of the pressure surge and dissipates it, preventing damage to the system.

Where should a water hammer arrestor be installed?

Typically, water hammer arrestors for a sprinkler system should be installed near the source of the water hammer, which is usually near valves that open and close frequently.

Can water hammer damage irrigation valves or pipes?

Yes, when water flow stops suddenly, it can create a pressure spike that sends a shock wave through the system. Repeated pressure surges may loosen fittings, crack PVC pipes, or wear out sprinkler valves and solenoids. Installing a water hammer arrestor, pressure regulator, or using slow-closing valves can help reduce these pressure spikes and protect your irrigation system from long-term damage.

How does a water hammer arrestor work?

Inside the arrestor is a sealed chamber with air and a piston or diaphragm. When the pressure spike occurs, the piston compresses the air cushion, absorbing the shock and reducing the pressure surge. This helps protect pipes, valves, and fittings from damage and keeps the plumbing system operating quietly.

Can I install a water hammer arrestor myself?

Yes, if you installed your own irrigation system, you can probably install a water hammer arrestor by yourself. However, if local plumbing codes require professional installation, it's best to hire a licensed plumber.