Installing a water hammer arrestor is a relatively straightforward plumbing task that can prevent damage to your pipes and reduce noise caused by water hammer. Here's a step-by-step guide:
Steps to Install a Water Hammer Arrestor
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Turn Off the Water Supply: Locate the shut-off valve for the fixture you're working on (e.g., under the sink for a faucet, near the toilet for a toilet). Turn it clockwise until it's completely closed. If you can't locate a local shut-off, you may need to turn off the main water supply to your house.
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Relieve Water Pressure: Open the faucet or flush the toilet (depending on where you're installing the arrestor) to relieve any remaining water pressure in the pipes.
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Disconnect the Existing Water Supply Line: Carefully disconnect the existing water supply line from the fixture's stop valve or pipe. Have a small bucket and towel handy to catch any residual water.
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Prepare for Installation: Determine the best location for the water hammer arrestor. Ideally, it should be installed as close as possible to the fixture causing the water hammer. Consider the orientation (vertical or horizontal) and the space available.
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Install a Tee Fitting (If Necessary): In some cases, you might need to install a tee fitting to accommodate the water hammer arrestor. This is often needed when space is limited or when you want to avoid disrupting the existing plumbing configuration too much. Ensure the tee fitting is properly sized to match your existing pipes and the arrestor. Use Teflon tape on the threads to create a watertight seal.
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Attach the Water Hammer Arrestor:
- Apply Teflon tape to the threads of the water hammer arrestor.
- Carefully screw the arrestor onto the stop valve, the tee fitting, or directly onto the pipe, depending on your configuration. Hand-tighten it first, then use a wrench to tighten it further, but avoid over-tightening, as this could damage the threads. The goal is a snug, leak-free connection.
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Reconnect the Water Supply Line: Reconnect the water supply line to the fixture's stop valve, or tee fitting. Again, use Teflon tape on the threads for a watertight seal.
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Turn the Water Supply Back On: Slowly turn the water supply valve counter-clockwise to restore water flow.
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Check for Leaks: Carefully inspect all connections for leaks. If you find any leaks, tighten the connections further. If leaks persist, you may need to disassemble the connection, reapply Teflon tape, and reassemble.
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Secure the Connection (If Necessary): If the water hammer arrestor is heavy, consider using a pipe clamp or strap to secure it to a nearby pipe or surface. This will help prevent strain on the connection and ensure long-term stability.
Example Scenario
Imagine you're installing a water hammer arrestor on a washing machine supply line. You'd:
- Turn off the hot and cold water supply valves to the washing machine.
- Disconnect the hoses from the washing machine and the supply valves.
- Install a tee fitting on each supply valve.
- Attach the water hammer arrestors to the open end of the tee fittings.
- Reconnect the washing machine hoses to the tee fittings.
- Turn the water supply back on and check for leaks.
By following these steps, you can effectively install a water hammer arrestor and protect your plumbing system from the damaging effects of water hammer.
