How to Shut Off Water in DC (Logistics & Contacts)

When water is running and you can’t stop it, every minute counts. This page is a logistics reference for shutting off water in the District: where the valve actually is in each building type, how to turn it, what the meter box at the curb does, and who to call when the source is the public main and your valve can’t help. It does not cover drying, cleanup, or repair — those are restoration questions handled elsewhere.

Shut off water in DC: the short answer

To shut off water in a DC home, find the main shutoff valve on the supply line where it enters the building — usually in the basement or cellar near the meter on the front wall. Turn a wheel valve clockwise until it stops, or a lever valve a quarter-turn crosswise to the pipe. If that fails or the source is public, call DC Water at (202) 612-3400, 24 hours.

Find your valve before the emergency

The single biggest mistake homeowners make is hunting for the shutoff while water pours in. Locate and test your main valve now, while it’s calm, and tell everyone in the household where it is. A valve you’ve already found and turned once is worth far more than any phone number.

There are usually two layers of shutoff between the street and your faucet:

• The interior main shutoff — inside the building, on your side of the meter. This is the one you operate.
• The curb stop — outside in the meter box near the sidewalk, owned by DC Water. This is the utility’s valve, used when the interior valve fails or for service work.

Know where both are. The rest of this page walks through each building type, then the curb stop, then who to call.

Where the shutoff is by building type

DC housing stock is mixed — Federal-era rowhouses in Capitol Hill and Georgetown, postwar single-family homes east of the river, and a wall of newer condos and apartment blocks. Where your valve lives depends on which you’re in.

Rowhouses and townhouses

In most DC rowhouses the service line enters through the front foundation wall, facing the street, because the water main runs under the street. Follow the largest-diameter pipe back to where it comes through the wall. The main shutoff is the valve closest to that entry point, typically right before or just after the water meter.

In older rowhouses the meter and valve may sit in a pit or box set into the cellar floor near the front wall, or occasionally outside in a vault near the sidewalk. If your basement is finished, the valve may be behind an access panel — another reason to find it before you need it.

Single-family detached homes

Detached homes have more variety. Check the basement or crawlspace wall facing the street first, then a utility room, garage, or the wall behind the water heater. The shutoff is again on the main supply line, usually paired with the meter.

Condos

Condos usually give you a unit-level shutoff — look near the water heater, in a utility closet, or where the supply line enters the unit — that isolates your home without affecting neighbors. Use this for a burst pipe inside your walls. The building main is controlled by the condo association or building staff, so keep their emergency contact handy for anything beyond your unit.

Apartments

Renters have the least control and need to plan the most. Most apartments have no tenant-accessible main. What you do have:

• Fixture stop valves — small oval or football-shaped knobs under each sink and behind each toilet. Turn them clockwise to isolate that one fixture. This stops a running toilet or a leaking faucet supply line.
• The building main — controlled by the property manager, super, or building engineer. For anything fixture stops can’t handle, you must reach them.

How to turn the valve

You’ll meet two valve types in DC homes. Knowing which you have saves precious seconds.

The plumber’s rule is simple: “righty-tighty” closes a wheel; a lever is closed when it’s perpendicular to the pipe, open when it’s parallel.

A few cautions from the field:

• Don’t force a stuck valve. Old gate-valve stems corrode and can snap if you crank too hard — turning a leak into a geyser. If it won’t budge with steady hand pressure, stop and go to the curb stop or call DC Water.
• Turn it slowly. Slamming a ball valve shut on a full line can cause water hammer. A smooth quarter-turn is enough.
• After closing, open a low faucet to relieve pressure and confirm the flow has actually stopped.

The curb stop and meter box

Out near the sidewalk you’ll find a metal or plastic lid — often marked for water — covering the meter box. Inside sits your meter and the curb stop, the valve DC Water uses to control service to your property. Under DC Water’s setup the utility owns the meter and the public side; the service line from the curb into your home is generally the property owner’s responsibility.

The curb stop is meant to be operated by DC Water, not customers, and it usually needs a long curb-stop key, not a standard wrench. Some homeowners keep one for emergencies, but the valve is often stiff or corroded and can require a specific operating position. If you can’t operate it safely, don’t force it — call DC Water and a crew will shut the service.

When your valve can’t stop it: call the right number

Your shutoff only controls water coming into your building. If the source is the public system, closing your valve does nothing — and you need a crew.

Match the situation to the call:

The full directory with hours and links lives on the DC water emergency contacts desk, and the formal reporting steps are on reporting a main break or sewer backup.

After the water is off

Shutting off the water is step two of the first 24 hours, not the whole job. Once the flow has stopped:

1. Confirm it stopped — open a low faucet and watch the meter; a still meter dial means no flow.
2. Document the loss before cleaning — photos and video of standing water and damage feed any insurance claim.
3. Notify the right parties — your insurer, and your landlord or HOA if you rent or own a condo.

The full sequence is on the first-24-hours logistics checklist. If repairs to piping or a gas appliance follow, remember that those are permitted, licensed work in the District — see DC plumbing and gas permits and verify any tradesperson on DLCP’s Scout license lookup.

Where to go next

• The contact directory: DC water emergency contacts
• Report it formally: report a main break or sewer backup
• The full first-day plan: first-24-hours logistics checklist
• Permitting the repair: DC plumbing and gas permits