Skip to main content

Shut Off Water Supply — Check Your Main Water Valve

Beginner3 hours

Part of project

How to Increase Water Pressure in Your House · Step 1 of 3

Helpful?

In this video

Before beginning any work, locate the main water shut-off valve for the house, which is typically near the water meter, and turn it off completely. Then, open the faucet at the laundry sink to drain any remaining water from the supply lines.

Goal: Prevent water spills and ensure a safe work environment

  • Always shut off the main water supply before starting any plumbing project to avoid flooding.
245.4K views2.7K5 minutes
Home Repair Tutor

671K subscribers

View Channel

FAQs

What specific tools, beyond a multi-screwdriver and pliers, might I need for this water pressure project?

You might also need an adjustable wrench for the PRV or stubborn aerators, and a bucket to catch any water during disassembly. Having a small brush or a de-scaling agent can be very helpful for thoroughly cleaning mineral deposits from aerators.

Are there any crucial safety precautions I should take before starting to work on my home's water pressure?

Always shut off the main water supply to your house before attempting to adjust or replace the PRV or clean aerators. This prevents accidental flooding or leaks. Also, wear gloves to protect your hands from grime and potential sharp edges.

How much should I expect to spend if I need to replace parts like a Pressure Reducing Valve or multiple aerators?

A new Pressure Reducing Valve (PRV) can cost $50 to $200 for the part itself, depending on the model and features. Individual faucet or showerhead aerators are much more affordable, typically ranging from $5 to $15 each. Factor these potential costs if simple cleaning or adjustments don't resolve the issue.

I've checked the main water valve and cleaned my aerators, but my water pressure is still low. What should I troubleshoot next?

If the main valve is fully open and aerators are clean, the Pressure Reducing Valve (PRV) is the next most likely culprit. Locate the PRV and try adjusting its screw clockwise to increase pressure. If adjustment doesn't help, or if the valve appears damaged, it likely needs replacement.