How to Fix Water Hammer:
The Only Guide You'll Ever Need

how to fix water hammer diagram

How to Fix Water Hammer

A water hammer is more than just an annoying clanking noise—a sign of serious issues within your plumbing system. Persistent water hammers can damage pipes, cause leaks, and even require costly repairs. In this comprehensive guide, we’ll walk you through how to fix water hammer problems and prevent damage to your home’s plumbing system.

First, it’s essential to understand what causes water hammer. This loud banging sound typically occurs when water creates a shockwave reverberating through your pipes due to the water’s sudden stoppage or change of direction. Common causes include high water pressure, loose pipes, or faulty valves.

Step 1: Identify the Cause

  • Listening to where the banging occurs is a crucial step in this process. Pinpointing the exact source can help you determine whether it’s a fixture issue or a whole-house problem, giving you the power to take the right action. Could you check your water pressure? Ideally, residential water pressure should be between 40 and 60 PSI. Anything above this could contribute to the water hammer.

Step 2: Secure Loose Pipes

  • Use pipe straps to secure loose pipes to walls or joists.
  • Add cushioning materials like foam insulation to absorb shock.

Step 3: Install Water Hammer Arrestors

  • These devices act as shock absorbers, cushioning the water flow and preventing the banging. The Oatey Company is a leading vendor of water hammer arrestors.
  • You can install them near noisy valves, such as washing machines or dishwashers.

Step 4: Drain Your Plumbing System

  • Turn off your water main.
  • Open all faucets to drain the system completely.
  • Turn the water back on gradually to allow air chambers to refill.

Following the four steps above, you can effectively fix the water hammer and prevent damage before it escalates into a bigger problem.

Is Water Hammer Giving You Headaches?

Fix water hammer problems before they cause significant damage

If the water hammer keeps you up at night, it’s time to take action. Ignoring the issue will affect your peace of mind and lead to expensive repairs down the road. The sooner you act, the less likely you will face long-term damage.

Why Immediate Action Is Important

  • Prolonged water hammers can weaken pipe joints, increasing the risk of leaks.
  • The pressure shock can damage appliances, including dishwashers and washing machines.
  • Persistent hammering can lead to burst pipes, flooding, and water damage.

Quick Fixes You Can Try Now

  • Tighten any visible loose pipe fittings.
  • You can reduce your water pressure using the main valve.
  • Use an adjustable wrench to tighten loose water supply valves.

These steps will help mitigate the water hammer before it becomes a costly disaster.

Pressure-Reducing Valve: The Secret to Fixing Water Hammer in Your Home

One of the most effective solutions for water hammer issues is installing a pressure-reducing valve (PRV). This valve helps control the overall water pressure in your system, preventing those shockwaves that cause hammering.

What is a pressure-reducing valve (PRV)?

A PRV device installed on the main water line automatically lowers incoming water pressure to a safe level for your home.

How a PRV Helps with Water Hammer

  • Reduces pressure surges that lead to water hammer.
  • Protects your pipes from having excessive pressure.
  • Extends the lifespan of appliances by maintaining consistent water flow.

Installing a Pressure-reducing Valve

  • Turn off the main water supply.
  • Locate the main water line.
  • Install the PRV according to the manufacturer’s instructions or hire a professional plumber.

This simple addition can help eliminate water hammer and keep your plumbing system safe and efficient.

Technical details for PRVs can be found at Flomatic Valves. 

 How to Fix Water Hammer in Your Shower with These Simple Steps

Does your shower scream at you every time you turn it off? This could be a sign of a water hammer in your shower. Luckily, fixing this issue doesn’t always require a complete plumbing overhaul.

Common Causes of Shower Water Hammer

  • High water pressure.
  • Loose showerhead fittings.
  • Faulty shower valves.

Fix the Water Hammer in the Shower

  1. Check the showerhead: Ensure it’s tightly secured and free from blockages.
  2. Adjust Water Pressure: Use your home’s main shutoff valve to decrease pressure.
  3. Install a Water Hammer Arrestor: Place it behind the shower valve to absorb shock.
  4. Inspect Shower Valves: Replace worn-out or faulty valves.

Addressing these issues when they occur can prevent long-term damage and ensure your showers remain peaceful and relaxing.

Fixing Water Hammer: When to Use a Pressure-Reducing Valve and Why

When should you consider a pressure-reducing valve for your water hammer fix? While simple solutions may work for minor cases, a PRV is the best long-term fix for persistent water hammers caused by high water pressure.

Signs You Need a PRV:

  • Consistent hammering noise across various fixtures.
  • Water pressure readings are consistently above 60 PSI.
  • Appliances showing signs of water pressure damage.

Why a Pressure Reducing Valve Is Effective:

  • It provides a consistent solution for whole-house water hammer issues.
  • It helps save energy by regulating water flow.
  • Protects your entire plumbing system from pressure-related damage.

Installing a PRV ensures your safe stays at safe levels, reducing the chances of long-term plumbing problems.

Conclusion

A water hammer is more than a minor annoyance—it’s a warning sign of potential plumbing issues that could lead to severe damage. By identifying the cause, securing pipes, and installing devices like water hammer arrestors or pressure-reducing valves, you can fix water hammer and prevent damage to your home’s plumbing system.

Taking action now can save you from future expensive repairs and extend the life of your plumbing system. So, if you’re experiencing water hammer, don’t wait. Follow the steps in this guide to fix the issue and protect your home. If you have limited time or lack expertise in plumbing, consider seeking professional plumbing assistance from Top Notch Plumbing.

FAQs

What causes water hammer? Water hammer is caused by the sudden stoppage or change in the direction of water flow, which creates a shockwave that reverberates through your pipes.

Can water hammer damage pipes? If left unchecked, water hammer can lead to cracked pipes, joint damage, and accelerated appliance wear.

How can I prevent water hammer? Installing a pressure-reducing valve, securing loose pipes, and using water hammer arrestors can help prevent future issues.

Do I need a plumber to fix the water hammer? While minor fixes can be done yourself, a licensed plumber should handle severe cases or installations of pressure-reducing valves.

How much does it cost to fix a water hammer? Costs vary depending on the severity of the problem and the solutions needed. DIY fixes are inexpensive, while professional installations of pressure-reducing valves can range from $150 to $350 or more. Get a quotation from an experienced, licensed plumbing company and enjoy the peace of a no-hammer shower!

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