A pipe fails at half past eleven at night. Water is coming through a kitchen ceiling and getting worse by the minute.
The homeowner does not know where the stopcock is. She looks under the sink, finds a cupboard full of cleaning products, empties it, finds a valve and cannot turn it because it has not moved in fifteen years.
By the time anybody stops the water, the damage is substantially worse than it needed to be, and every minute of that was preventable on an ordinary afternoon.
1. Find it before you need it
The single most useful piece of household maintenance anybody can do. Ten minutes on a quiet afternoon against an hour of water at midnight is not a close comparison.
2. Look in the usual places
Under the kitchen sink, in a downstairs cloakroom, under stairs, in a garage or utility room, and near where the supply enters the building.
3. Find the external one too
At the boundary, usually under a small cover in a path or pavement. This is the one that works when the internal one has seized, and it needs a key or a long tool.
4. Check it actually turns
Gently, and only far enough to confirm it moves. A seized stopcock is the commonest failure at the worst moment and it is identified in seconds.
5. Do not force a seized valve
Forcing frequently breaks it and creates the flood it was meant to stop. A seized stopcock should be replaced calmly rather than fought with in an emergency.
6. Have it replaced if it does not move
A straightforward job on an ordinary day, and a lever type valve is considerably easier to operate quickly than an older tap style one.
7. Label it clearly
So that anybody in the household, or a visitor, can find it. A label costs nothing and it works when the person who knows is not at home.
8. Tell everybody in the household
Including anybody staying regularly. The person who knows is frequently the person who is away when it happens.
9. Learn the isolation valves too
Individual valves at basins, toilets and appliances. These stop a single fitting without turning off the whole house, which is frequently all that is needed.
10. Know where the heating system isolates
Separate from the mains supply, and relevant when a radiator or heating pipe fails rather than a supply pipe.
11. Know how to drain down afterwards
Opening taps at the lowest point to clear what remains in the pipes, which limits what continues to come through a ceiling after the supply is off.
12. Turn the electrics off where water is involved
Water near lighting or sockets is the genuinely dangerous part of any leak, and it is the thing least likely to occur to somebody in a panic.
13. Know what to do if the property is empty
Turning the supply off when away, particularly in cold weather, which prevents the failures that are discovered days later.
14. Answer the emergency questions at half past eleven at night
An assistant that tells somebody where to look for a stopcock, what to do if it will not turn, how to isolate a single fitting, when to turn the electrics off and what to do while waiting limits the damage before anybody arrives. The diagnostic side sits in leak detection questions before anything is opened up, the hot water systems in unvented cylinder and hot water enquiries, and the same urgent status handling in where is my order questions that flood dtc inboxes and how to use a chatbot for order tracking. See features, start at try, and the sector view sits under plumbers.