How to Stop a Leak Before the Plumber Arrives

A leak rarely waits for a convenient time. What you do in the first few minutes can be the difference between a quick repair and a much bigger, more expensive job. Here's a simple order of operations.

1. Find and Turn Off Your Stopcock

Every home has a stopcock — the main valve that controls water coming into the property. It's usually found under the kitchen sink, in a downstairs cupboard, or near where the water pipe enters the house. Turning it off (usually clockwise) stops the flow of water at the source, buying you time until a plumber can get to you. It's worth finding yours today, before you ever need it in a hurry.

2. Turn Off the Local Isolation Valve, If There Is One

Many appliances — toilets, washing machines, dishwashers, sinks — have their own small isolation valve nearby. If the leak is clearly coming from one appliance, shutting off its local valve can sometimes solve the problem without cutting off water to the whole house.

3. Protect Anything Nearby

Move furniture, electronics and valuables away from the water. Lay down towels or a bucket to catch what you can, and mop up standing water where it's safe to do so — pooled water damages flooring and can travel further than expected.

4. Think About Electrics

If water is anywhere near sockets, switches or light fittings, treat it as a safety issue first. If it's safe to reach your consumer unit, switch off the power to the affected area. If you're at all unsure, don't touch anything electrical — leave the property if needed and call for help.

5. Don't Rely on Tape or Sealant as a Fix

Plumber's tape, epoxy putty or a pipe clamp can slow a leak down as a genuinely temporary measure, but they're not a repair. Pipes under pressure will usually find a way around a makeshift seal. Use them to buy time, not to avoid calling someone out.

6. Take Photos as You Go

If there's any damage to flooring, walls or belongings, a few photos before you start clearing up will make things much easier if you need to make an insurance claim later.

Once the immediate danger is under control, the priority is finding out why the leak happened and fixing it properly — not just stopping the drip. That's where a proper inspection comes in. If the leak is severe, treat it as a genuine plumbing emergency and call straight away.