Understanding Water Hammer Arrestors for Dishwasher Functionality and Performance Improvement

Understanding Water Hammer Arrestors for Dishwashers

Water hammer is a common plumbing issue that many homeowners experience, characterized by a loud banging or knocking noise that occurs when a faucet or valve shuts off suddenly. This phenomenon can be jarring and, over time, it may damage plumbing fixtures and appliances such as dishwashers. One effective solution to mitigate the effects of water hammer is the installation of a water hammer arrestor. In this article, we’ll delve into the mechanics of water hammer, explore how water hammer arrestors operate, and discuss their importance, particularly in connection with dishwashers.

What is Water Hammer?

Water hammer is caused by the sudden stop or change in the flow of water within pipes. When a valve closes quickly—like when a dishwasher completes its cycle and shuts off—the momentum of the moving water creates a pressure surge. This surge results in a shock wave that travels through the pipeline, leading to loud banging noises that can be startling and potentially harmful to your plumbing system. Over time, this can cause seals to wear out, joints to loosen, and possibly even pipe damage.

The Role of Water Hammer Arrestors

A water hammer arrestor is a device designed to absorb the shock caused by the sudden change in water flow. These devices consist of a small chamber that contains air or gas which acts as a cushion. When a water hammer event occurs, the excess pressure compresses the air, minimizing the impact of the shock wave and thereby reducing the noise and potential damage associated with water hammer.

Why Are Water Hammer Arrestors Important for Dishwashers?

Dishwashers are notorious for contributing to water hammer due to their automatic fill valves and powerful spray arms that operate under high pressure. The sudden closing of these valves—particularly in modern dishwashers—can lead to severe water hammer symptoms. Thus, the importance of installing water hammer arrestors cannot be overstated. Here’s why

1. Preventing Damage to Plumbing By absorbing the shock from water hammer, these devices can help preserve the integrity of your plumbing system. This reduces the risk of loose fittings, cracked pipes, or damaged appliances.

2. Noise Reduction A water hammer arrestor significantly decreases the abrupt sounds associated with water hammer, providing a more peaceful environment in your home.

3. Extending Appliance Lifespan With the absorption of shock and reduction in wear and tear, water hammer arrestors can help extend the lifespan of your dishwasher, ensuring it operates efficiently for years.

4. Improving Water Pressure Properly installed water hammer arrestors can also help stabilize water pressure in your system, contributing to better performance in appliances and fixtures throughout your home.

Installation and Maintenance

Installing a water hammer arrestor is a relatively straightforward process, though it may require some plumbing knowledge. Typically, they can be installed on the water supply line feeding the dishwasher or any other fixtures that experience water hammer. It’s essential to select a size appropriate for your home’s plumbing system, as one size does not fit all.

Maintenance of water hammer arrestors is generally minimal. However, if you notice a return of water hammer sounds or a persistent decrease in performance from your dishwasher, it may indicate that the arrestor is not functioning correctly. In such cases, checking for trapped air and ensuring that the device is functioning properly is advised.

Conclusion

Water hammer can be an annoying problem and can lead to significant harm to your plumbing system and appliances. Water hammer arrestors offer an effective and essential solution, particularly for dishwashers that are prone to creating sudden pressure changes. By investing in these devices, homeowners can protect their plumbing, extend the life of their appliances, and enjoy a quieter household environment. If you suspect that water hammer is an issue in your home, consider consulting with a plumbing professional to explore the benefits that flow from installing water hammer arrestors.