When Is a Leaking Pipe a Plumbing Emergency?

Signs a leaking pipe is an emergency

• Water is flowing steadily and you cannot stop it at the stopcock or isolation valve
• The leak is near electrical wiring, sockets or your consumer unit
• Water is coming through a ceiling or light fitting
• The pipe has burst rather than just weeping, with a visible split or crack
• You have no way to control or contain the water and it's affecting more than one room
• The leak is affecting your only working toilet or your hot water supply and there's no reasonable way to manage without it overnight

Signs it can wait for a normal appointment

A slow weep at a joint, a damp patch that isn't growing, or a drip you've successfully stopped with the stopcock or isolation valve are all things that need fixing, but don't usually require an out-of-hours callout. In these cases, containing the leak and booking the next available appointment is the sensible approach.

A dripping outside tap, a slightly damp patch under a bath panel that hasn't changed in size for a few days, or a toilet cistern that trickles occasionally but doesn't overflow all fall into this category. They're worth fixing promptly, but they're not the kind of fault that justifies paying an out-of-hours rate.

What to do while you wait for help

• Shut off the water supply to the affected pipe or the whole property if necessary
• Contain any dripping water with towels and buckets
• Keep the area ventilated to reduce the risk of damp and mould setting in
• Avoid using appliances connected to the affected pipework until it's been checked
• If the leak is from a specific fitting, such as a washing machine hose, disconnect and isolate that appliance specifically rather than shutting off the whole house if you don't need to

Why pipes leak in the first place

Common causes include corrosion in older copper or steel pipework, joints that have loosened over time, frost damage where pipes have frozen and cracked, and pipework that has been disturbed during other building work. Plastic push-fit fittings can also fail if they weren't seated correctly when installed.

Vibration from nearby building work, a badly supported run of pipe rubbing against a joist, or simply age and hard water scale weakening a joint from the inside can all contribute. In many cases more than one factor is at play, which is why a proper inspection rather than a guess is worthwhile.

How out-of-hours pricing works

If a leak genuinely can't wait, it helps to know roughly what you'll pay before you call. Daytime plumbing work is charged at £99 per hour, rising to £120 between 5pm and 7pm, £185 out of hours, and £220 on Sundays and bank holidays, all with a one-hour minimum then billed in 30-minute increments after that. There's no separate call-out charge and no extra emergency premium on top of these rates, so the figure you're quoted is the figure you pay for the time worked.

Getting it looked at properly

Even a leak that seems minor is worth having assessed, because a joint that's weeping today can fail completely without warning. A plumber can identify the underlying cause rather than just patching the symptom, which matters if the pipework is old or if the same joint has failed before.

When you call, mention whether the leak is constant or intermittent, roughly how much water is escaping, and whether it's affecting anything electrical. This helps whoever takes the call judge urgency accurately and get the right person out at the right time.