Sep 30, 2024

DIY

Finding Your Water Shutoff Valve: A Homeowner’s Guide

Water emergency? Know where, and what, to turn.

Imagine this: you’re relaxing at home, and suddenly, you hear water gushing. A pipe has burst, and water is flooding your living room. Panic sets in.

Do you know where your main water shutoff valve is? If you do, you can stop the flood in seconds. If not, you’re in for a costly disaster.  

This guide will help you find your water shutoff valve before you need it. If you're unsure where to locate it, this handy guide is for you.

What is a water shutoff valve?

A water shutoff valve is a crucial part of your home's plumbing system. It controls the flow of water into your home, allowing you to quickly stop the water supply.  

When a leak, burst pipe, or other plumbing emergency strikes, your first move should be straight to the shutoff valve. Knowing where to find your water shutoff valve and how to use it can prevent serious water damage and costly repairs.

Why knowing your water shutoff valve matters

A homeowner fixing plumbing under a bathroom sink

Water is a homeowner's friend when it stays where it belongs. But when it ends up streaming from a burst pipe or leaking from a broken water heater, it's a homeowner's worst nightmare. Even a small leak can cause thousands of dollars in damage. That’s why knowing the location and function of your main water shutoff valve is crucial.

Turning off your water quickly can help prevent damage. It can save you from needing professional water damage restoration. If you're super quick to the valve, you might just need a towel dry.

Your water shutoff valve isn't just for emergencies. It's also handy for DIY plumbing projects, like fixing a leaky faucet, replacing a toilet or installing a new dishwasher. Turning off the water keeps your work area safe and clean. It stops leaks and spills while you do home repairs and upgrades.

Two stories: Prepared vs. unprepared

Sarah's story

When Sarah moved into her new home, she made a point to explore every nook and cranny. Her first stop was the main water shutoff valve in the basement. She noted its location along with the breaker panel and emergency exits. Feeling prepared, she knew exactly where to go if disaster ever struck.

One winter night, a pipe burst. She sprinted to the basement, turned the valve, and stopped the water in seconds. The damage was minimal — a small section of wet carpet. After gathering all the spare towels and thoroughly drying the area, she hung up the carpet to dry.  

The next day, there was no sign of damage.

Tom's story

A dehumidifier in an empty room with mould on the wall

Tom, on the other hand, didn’t bother to look for his shutoff valve when he moved into his new house. Now, after 4 issue-free years, what was the point?

But when his washing machine hose burst, he fumbled around, trying to find the water shutoff. By the time he finished, water flooded his entire laundry room and his basement rec room below.  

The repairs cost him thousands of dollars, and months of headache.

The takeaway: Be like Sarah. Know your shutoff valve's location and how to use it.

The valve that could save your home

Every home has a main water shutoff valve that controls the flow of water into the house. It's the first line of defense in a water emergency. When water enters your home, it passes through valves installed by the city. Your main shutoff valve is the one you control.

Where to find it:

  • Basement
  • Exterior wall of a utility room
  • Near the water meter
  • In older homes, it might be outside near the foundation

Types of main shutoff valves

1. Gate valve

A gate valve on a water shutoff valve

Gate valves have a round, screw-like knob. Think of the knob on your outdoor hose tap.

How to use: Turn the knob clockwise to close.

Maintenance: Gate valves can get stuck if not turned regularly. Close and reopen it every 3 to 6 months to keep it moving freely.

Troubleshooting: If it’s stuck, spray the stem with penetrating oil like WD-40. Lightly tap it with a wrench to loosen it.

2. Ball valve

A ball valve water shutoff valve

Ball valves have a lever or handle that turns the water on and off. They are sturdy and easy to use.

How to use: When the handle is aligned with the pipe, the valve is open. To close it, turn the handle a quarter turn so it’s perpendicular to the pipe.

Quick tip: This valve is easy to operate, even under pressure. If you have one, practice turning it a few times so you know exactly what to do in an emergency.

Turning the water back on

After you've repaired the issue, it's time to turn the water back on. Here's how to do it without causing further problems:

  1. Unscrew faucet aerators: Before turning on the water, remove the small screens (aerators) from all your faucets. This prevents debris from clogging them.
  1. Turn the valve slowly: Turn the valve back on slowly to avoid a sudden surge of water pressure.
  1. Check for leaks: Sometimes, the valve's stem may leak after being turned back on. Tighten the packing nut holding the valve's stem in place just enough to stop the leak.

Find your valve: A minute now saves thousands later

A homeowner cleaning up after a flood

Being prepared can save you stress, money, and time. Knowing where your shutoff valve is and how to use it puts you in control when water threatens your home. Take a moment today to find it and test it. You’ll thank yourself later when a potential disaster is just a minor inconvenience.

Be the homeowner who turns a crisis into a minor hiccup, like Sarah did. Don't wait until it's too late.