How to Find and Use Your NYC Apartment's Shut-Off Valves

Before You Start

First thing you do when you move into any apartment: find every shut-off valve. Don't wait until water is spraying across your kitchen floor at 2 AM.

I've responded to emergencies where tenants lived there 15 years and had no idea where their shut-offs were. One Midtown co-op, a supply line burst under the kitchen sink and the tenant ran into the hallway yelling for help. She was standing three feet from the shut-off the entire time.

Ten minutes now saves you from catastrophe later.

Step 1: Under Every Sink

Open cabinet doors under your kitchen and bathroom sinks. Look for two small valves on pipes coming from the wall - one hot, one cold.

Gate valves (round handles): Turn clockwise to close. Common in pre-war buildings. Can be unreliable after decades unused.

Ball valves (lever handles): Turn lever perpendicular to pipe to close. More reliable.

Test them now. Turn each off, confirm water stops at the faucet, turn back on. If a valve is frozen, note it and tell your super. Better to find out now.

Step 2: Toilet Shut-Off

Wall behind and below the toilet. Single valve connected to the supply line. Turn clockwise to close. Test by flushing. Every toilet should have its own valve.

Step 3: Apartment Main Shut-Off

Controls all water to your unit. Check these locations:

Utility/mechanical closet (hallway, kitchen, or near water heater)

Under kitchen sink (sometimes combined with fixture shut-offs)

Behind an access panel near the bathroom or kitchen riser

Hallway outside your apartment (some buildings use locked panels)

Pre-war reality: A lot of NYC apartments don't have individual apartment shut-offs. Water comes off the riser with no master valve. The only option is the riser valve, which also shuts off every apartment on your line.

Step 4: The Riser Valve

The riser carries water up through the building. Riser shut-off valves are usually in the basement (super controls them), but some buildings have valves on each floor behind hallway access panels.

Ask your super where the riser valves are for your line. Write it down. Put it in your phone. Tell everyone in your household.

Step 5: Know Your Building's Emergency Protocol

Find out NOW:

Super's phone number - in your contacts, not on paper you'll lose

After-hours emergency number

Building main shut-off location (basement, near water service entrance)

24-hour staff who can respond if super is unreachable

In an Active Emergency

Close the closest shut-off to the leak

If that fails, close the apartment main

If no apartment main, run to the riser valve on your floor

Call your super immediately

Contain water with towels and buckets

Warn the apartment below you - water travels down

NYC insurance note: Renter's insurance ($15-25/month) covers your belongings. Your landlord's insurance covers the building, not your stuff. Water damage is the most common claim type. Get renter's insurance.

Maintenance

Exercise valves twice a year. Turn each off and on. Prevents seizing from disuse. A valve untouched for 10 years is decorative, not functional.