A water hammer arrestor is a device designed to control the loud banging noises and vibrations caused by sudden pressure fluctuations in a plumbing system. These pressure fluctuations, often referred to as water hammer, can damage pipes, valves, and appliances over time. While it is always recommended to seek professional assistance for any plumbing work, installing a water hammer arrestor can be a DIY project for those with moderate plumbing knowledge and tools. In this article, we will explore the steps involved in installing a water hammer arrestor and discuss the considerations to keep in mind.
Understanding Water Hammer
Before diving into the installation process, it is important to understand what water hammer is and why it occurs. Water hammer is caused by the rapid stoppage or redirection of water flow within a plumbing system. This sudden change in momentum creates a shockwave that travels through the pipes, resulting in the loud banging noise commonly associated with water hammer. This shockwave can cause damage to plumbing fixtures and shorten the lifespan of the plumbing system as a whole.
Types of Water Hammer Arrestors
There are various types of water hammer arrestors available on the market, and the most common ones include piston-style, diaphragm-style, and air chamber-style arrestors.
Piston-style arrestors use a piston mechanism to absorb the shockwave in the water flow, while diaphragm-style arrestors use a flexible diaphragm to absorb the shockwave. Air chamber-style arrestors, on the other hand, work by incorporating a vertical pipe section filled with air, which acts as a cushion to absorb the shockwave.
Installing a Water Hammer Arrestor
1. Determine the Needed Location
The first step in installing a water hammer arrestor is to determine the appropriate location. Water hammer arrestors are typically installed near plumbing fixtures and appliances that are prone to water hammer, such as washing machines, dishwashers, or toilets. Identify the water supply line that serves the fixture and locate a suitable spot to install the arrestor.
2. Turn Off the Water Supply
Before starting any work on your plumbing system, it is crucial to turn off the water supply. Locate the shutoff valve for the specific fixture or, if necessary, shut off the main water supply to the entire property.
3. Drain the Water
Once the water supply is turned off, you need to drain any remaining water in the plumbing line. This can be done by opening the faucet or fixture connected to the water supply line and letting the water flow until it stops completely.
4. Prepare the Pipes
To install a water hammer arrestor, you will need to cut into the existing water supply line. Measure and mark the appropriate section of the pipe where you will install the arrestor. Use a pipe cutter or a hacksaw to make a clean, straight cut on the marked section.
5. Install the Water Hammer Arrestor
The chosen type of water hammer arrestor will determine the specific installation process. If you opt for a piston-style or diaphragm-style arrestor, follow the manufacturer’s instructions for installation, which typically involves soldering or using compression fittings. If you choose an air chamber-style arrestor, the process is simpler and usually involves connecting the arrestor between two sections of pipe using appropriate fittings.
6. Test for Leaks
After installing the water hammer arrestor, it is essential to test for leaks before closing everything up. Turn on the water supply and check for any signs of leaks around the arrestor or the fittings. If necessary, tighten the connections or make adjustments to eliminate any leaks.
Installing a water hammer arrestor without professional assistance is possible for individuals with basic plumbing knowledge and tools. By understanding the nature of water hammer, choosing the appropriate type of arrestor, and following the installation steps carefully, you can effectively control the pressure fluctuations in your plumbing system and protect your fixtures and pipes from potential damage. However, it is crucial to remember that if you are unsure or uncomfortable with any step in the process, seeking the help of a licensed plumber is always the best approach to ensure a successful installation.