If a pipe has burst, a fixture is spraying water, or you have a leak you can’t stop at the fixture level, shutting off the main water supply is the first thing to do. Every second of delay means more water damage. This guide is intentionally short — find your situation and act.
Find Your Main Shutoff Valve First (Before You Need It)
The time to locate your main shutoff valve is now, not during an emergency. In Santa Cruz homes it’s typically in one of these locations:
Inside the home:
- Against an exterior wall in the garage, usually near where the water line enters from the street
- In a utility room, basement, or crawl space access point
- Under the kitchen sink in some older homes
Outside the home:
- Near the foundation, usually on the street-facing side of the house
- Inside a ground-level box set into a concrete pad or soil near the front of the property — this is the meter box, which contains both the meter and sometimes a shutoff valve
If you’re not sure where yours is, walk the perimeter of your house near the front and check the garage wall closest to the street. That covers the majority of Santa Cruz homes.
Do this now: Go find your main shutoff valve, confirm it opens and closes, and make sure every adult in the household knows where it is.
How to Turn It Off
Ball valve (lever handle): Turn the lever a quarter turn so it’s perpendicular to the pipe. Perpendicular = closed, parallel = open. This is the most common type in homes built or replumbed in the last 30 years.
Gate valve (round wheel handle): Turn clockwise until it stops. These require multiple full rotations. Gate valves are common in older homes and are less reliable than ball valves — they sometimes don’t fully close after years of disuse, and the packing can fail.
If the valve won’t turn: Don’t force it — a frozen gate valve stem can break, making things significantly worse. Use penetrating oil and wait a few minutes, or call a plumber. If the situation is urgent and the indoor shutoff won’t budge, go to the meter.
The Meter Box (Street Shutoff)
If the indoor main shutoff is inaccessible, stuck, or you can’t find it, the water meter box is the backup. It’s located near the street, typically in a concrete or plastic box set flush with the ground.
To find it: Walk to the street-facing edge of your property. The box is usually within a few feet of the sidewalk or property line. Look for a rectangular or round cover marked “Water.”
To close it: Open the lid (may require a flathead screwdriver). Inside you’ll see the meter and a shutoff valve. The shutoff may be a ball valve or a gate valve. Turn it off the same way as above.
Note: Santa Cruz Water considers the meter and meter-side valve city property. You’re permitted to shut it off in an emergency, but call Santa Cruz Water after to inform them. Don’t tamper with the meter itself.
After Shutting Off the Water
Relieve pressure: Open a faucet on the lowest level of the house to drain remaining water from the pipes. This reduces pressure and helps any repairs go more smoothly.
Assess the situation: With the water off, identify where the leak or break is. If it’s at a fixture or supply line, it may be a straightforward repair. If it’s inside a wall or under the slab, call a plumber.
Don’t restore water until the break or leak is repaired or isolated. Turning the main back on with an open pipe runs water directly into your home.
Individual Fixture Shutoffs
For many situations — a running toilet, a leaking supply line under a sink, a dripping faucet — you don’t need to shut off the main. Most fixtures have individual shutoff valves:
- Toilet: Oval-handled valve on the wall at floor level behind the toilet
- Sink: Valves under the sink on the hot and cold supply lines
- Water heater: Cold water inlet valve at the top of the unit
- Washing machine: Hot and cold valves on the wall behind the machine
- Refrigerator ice maker: Small saddle valve or inline valve on the cold water supply line nearby
Use the individual shutoff when the problem is at a single fixture. Use the main when the problem is a burst pipe, a leak inside a wall, or anything you can’t isolate at the fixture level.
If the Main Shutoff Valve Itself Is the Problem
Older Santa Cruz homes — particularly those with original galvanized or copper supply lines — sometimes have main shutoff valves that have never been serviced and won’t close fully, or that develop leaks at the packing nut when operated. If your shutoff valve is stuck, leaks when you try to close it, or doesn’t fully stop flow, it needs to be replaced.
Replacing a main shutoff valve requires shutting off water at the meter first. If the meter shutoff is also stuck or inaccessible, call Santa Cruz Water — they can shut off water at the street main. This is a water line repair job for a licensed plumber.
Emergency Plumbing in Santa Cruz
If you have a burst pipe, active flooding, or a leak you can’t contain, Eco-Flow Plumbing Inc. provides emergency plumbing service throughout Santa Cruz County — including Santa Cruz, Live Oak, Aptos, Capitola, Soquel, Scotts Valley, Seabright, Felton, Boulder Creek, and Watsonville.
(831) 818-6331 — Contact us for emergency service.
This article was written by Scott Liess, founder of Eco-Flow Plumbing and a licensed plumbing contractor with over 18 years of experience serving the Santa Cruz community.
