Emergency Plumber: What to Do First When a Pipe Bursts or a Drain Backs Up

The first job in any plumbing emergency is to stop the water. Find the main shut-off valve — usually near where the water line enters the house, in a utility room, garage, or basement — and turn it clockwise until it stops. If only one fixture is the problem, use its own shut-off instead: the valve behind a toilet, under a sink, or at the washing machine. Knowing where these valves are before an emergency is worth more than any tool, so take five minutes this week to locate them and check they still turn.

Next, protect what the water can still reach. Move rugs, electronics, and anything on the floor out of the way, and put towels or a bucket under an active drip. If water is near outlets, switches, or appliances, do not wade in — turn off power to that area at the breaker panel first. Mop up what you can, but do not open walls or pull up flooring yourself; hidden water in wall cavities and under floors is what turns a one-day repair into mold and rot weeks later.

For a backed-up drain, the rule is different: stop using water in the house. Flushing or running a tap while a main drain is blocked only pushes more water out of the lowest drain in the house, which is usually a floor drain or a basement toilet. A single slow sink is usually a local clog; water coming up in a tub when you flush is a sign the main line is involved, and that is a job for a professional with the right equipment, not a chemical drain cleaner.

While you wait for help, gather the facts a plumber will ask: where the water is coming from, when it started, whether the shut-off worked, and whether the problem is one fixture or the whole house. Photograph the damage before cleanup for insurance, and keep any broken parts. If the problem involves a water heater, a gas line, or sewage, say so when you call — those change what equipment and safety steps the visit needs.

Same-day and 24/7 emergency services are subject to provider participation, location, technician availability, and demand. Availability is not guaranteed. Our plumbing team serves the areas listed on our service areas page. Call Join Pro Home Services at +1 (603) 372-8478 to describe the problem and get an upfront flat-rate price before any work starts.