Skip to main content

Shut Off Water Supply and Relieve Pressure — Preparation and Water Shut-off

Beginner

Part of project

How to Install a Water Hammer Arrestor to Stop Banging Pipes · Step 1 of 7

Helpful?

In this video

Before beginning any work, locate and turn off the water supply to the sink. This is typically done via the shutoff valves located under the sink cabinet or in the wall behind the sink. If your home has a water manifold system, you may need to shut off the specific valve for that fixture there. Once the water is off, open the faucet handle you are repairing to drain any remaining water and release pressure from the line.

Goal: Plumbing

  • Failure to completely shut off the water can result in significant water flow and potential flooding when you disassemble the faucet.
447.1K views9673 minutes
SharkBite Plumbing

32K subscribers

View Channel

FAQs

Do I really need all the listed tools for this water hammer arrestor installation, or can I manage with fewer?

For a successful and leak-free installation, the tubing cutter, deburring tool, and adjustable wrenches are essential. While you might try a hacksaw, a tubing cutter ensures a cleaner, square cut vital for compression fittings. The deburring tool prevents damage to the O-ring and ensures a tight seal, so these are not optional for a reliable outcome.

What are the critical safety precautions I must take when installing a water hammer arrestor, especially as a beginner working with plumbing?

Always begin by shutting off the main water supply to your home and draining the lines to prevent unexpected floods or sprays. Wear safety glasses to protect against debris and gloves to prevent cuts from sharp pipe edges. Double-check that the water is completely off before making any cuts to the pipe.

How much time should a beginner budget for this water hammer arrestor installation, and what's the approximate material cost?

A beginner should typically budget 1 to 2 hours for this project, allowing time for preparation, precise cutting, assembly, and thorough leak checks. The primary material cost will be for the water hammer arrestor itself and the compression tee, generally ranging from $30-$60 depending on your specific chosen parts and local pricing.

What are the most common mistakes beginners make when installing a water hammer arrestor, and how can I avoid them?

A frequent mistake is not deburring the pipe ends thoroughly, which can lead to leaks at the compression fitting due to an improper seal. Another common error is under-tightening the compression nuts; ensure they are snug and firm, but avoid overtightening and stripping the threads. Also, remember to use Teflon tape on the arrestor's threaded connection points, but not on the compression connections themselves.