Home / What is Water Hammer and How to Prevent It?

What is Water Hammer and How to Prevent It?

March 26, 2025

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That alarming banging noise in your pipes isn’t just annoying—it signals a plumbing issue called water hammer that requires attention. At Garon T Plumbing, Heating, AC & Electric, a trusted plumber in Brick Township, NJ, we often help homeowners address this common but concerning plumbing problem before it leads to serious damage.

Understanding Water Hammer

Water hammer occurs when flowing water suddenly stops or changes direction, creating a shock wave that reverberates through your plumbing system. This hydraulic shock happens most commonly when you quickly close a faucet or when washing machine valves shut abruptly. The resulting pressure can exceed 150 PSI—enough force to damage pipes, loosen fittings, and eventually cause leaks that require emergency plumbing assistance.

Signs You’re Experiencing Water Hammer

Beyond the characteristic banging sound, watch for these indicators that you need plumbing repair:

  • Vibrating pipes
  • Rattling inside walls after water use
  • Leaking or dripping fixtures
  • Reduced water pressure
  • Water spitting from faucets

DIY Solutions for Minor Cases

For mild water hammer issues, try these approaches before calling a plumbing company:

  • Drain and Refill Your Plumbing System
  • Turn off your main water supply
  • Open all faucets to drain the system
  • Turn water back on and close faucets
  • This restores air chambers that may have become waterlogged

Check Water Pressure

High water pressure often contributes to water hammer. If your home’s water pressure exceeds 80 PSI, consider installing a pressure regulator.

When to Call for Professional Plumbing Repair

Contact an emergency plumber immediately if:

  • DIY solutions don’t resolve the issue
  • You notice leaking pipes or joints
  • The noise intensifies or becomes more frequent
  • You have older plumbing without modern water hammer arrestors

Prevention Through Proper Plumbing Installation

The most effective long-term solution involves installing water hammer arrestors—devices that absorb hydraulic shock. During any plumbing installation, these protective components should be incorporated near quick-closing valves and appliances.

Protect Your Plumbing System

Don’t ignore water hammer. This warning sign can lead to expensive repairs if left unaddressed. Contact Garon T Plumbing, Heating, AC & Electric today for a comprehensive evaluation of your plumbing system and expert solutions to prevent water hammer damage.

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