What to Do in a Plumbing Emergency | Medway Plumber’s Guide
A plumbing emergency announces itself without subtlety. Water pouring through the ceiling from somewhere above. A pipe that’s burst behind the wall and you can hear it running. A toilet that won’t stop overflowing no matter what you do. A boiler that’s failed and the house is getting colder by the hour. The heating system making a noise you’ve never heard before and water appearing where water shouldn’t be. These situations need dealing with immediately — not tomorrow, not at the weekend, but right now before the damage gets worse.
What you do in the first few minutes makes a significant difference to how much damage occurs and how costly the repair becomes. Knowing where your stopcock is, which valves control which systems, and what steps to take before the plumber arrives can be the difference between a contained problem and a ruined ceiling. This guide covers the most common plumbing emergencies Medway homeowners face, what to do immediately in each situation, and how to decide whether you need an emergency call-out or can safely wait for a standard appointment.
Burst or Leaking Pipes
A burst pipe is the most dramatic plumbing emergency and the one where every minute counts. Water under mains pressure flowing uncontrolled through your home causes damage continuously — saturating plasterboard, soaking through ceilings into the rooms below, ruining flooring, and potentially reaching electrical installations where water and electricity create a dangerous combination.
What to do immediately:
Turn off the water at the stopcock. In most Medway properties — whether you’re in a Victorian terrace in Gillingham, a semi in Chatham, or a post-war house in Walderslade — the internal stopcock is typically under the kitchen sink or in the downstairs hallway. Turn it clockwise until it’s fully closed. If the stopcock is stiff or seized, don’t force it with pliers as you risk snapping the valve — wrap a cloth around it for grip and turn firmly but steadily.
Once the mains supply is off, open the cold taps downstairs to drain the remaining water from the system and relieve the pressure. If the burst is on a hot water pipe, turn off the boiler or immersion heater and open the hot taps to drain the stored hot water. If you have a cold water tank in the loft — still common in older Medway properties — turn off the gate valve on the outlet pipe if accessible, or place containers under the burst to catch water while the tank drains through the open taps.
Minimise the damage:
Move furniture, electronics, and anything valuable away from the affected area. Place buckets and towels under ceiling drips. If water is pooling on the floor, mop it up quickly to prevent it seeping into the subfloor and the ceiling of the room below. If water is dripping near light fittings or electrical sockets, switch off the electricity at the consumer unit for the affected circuit — don’t touch light switches or sockets in a wet area.
Call a plumber once you’ve contained the immediate situation. A burst pipe needs professional repair but the urgency reduces significantly once the water supply is off and the active flow has stopped.
Boiler Failure
A boiler that stops working in winter feels like an emergency, and if you have vulnerable people in the household — elderly residents, young children, or anyone with health conditions affected by cold — it genuinely can be one. For a healthy household in a well-insulated Medway property, a boiler failure is uncomfortable but manageable overnight, and waiting for a standard appointment rather than paying emergency rates is usually the more sensible approach.
What to check before calling:
Check the pressure gauge on the front of the boiler. If it’s dropped below 1 bar, the system may simply need repressurising through the filling loop — the braided hose beneath the boiler with a valve at each end. Open the valves slowly until the gauge reads between 1 and 1.5 bar, then close them firmly. Reset the boiler and see whether it fires.
Check the thermostat is set correctly and the timer hasn’t been accidentally changed. Check that the gas supply is on — try another gas appliance like the hob to confirm gas is reaching the property. Check the condensate pipe — the small plastic pipe running from the boiler to an outside drain. In cold weather this pipe can freeze, particularly on properties across the Medway Towns where the condensate pipe runs along an exposed external wall. Thawing it carefully with warm water from a kettle often restores boiler operation.
If none of these resolve the issue, the boiler needs professional diagnosis. If you have heating but no hot water, or hot water but no heating, the fault is usually a diverter valve or motorised valve rather than a complete failure — uncomfortable but not urgent. If you have neither and vulnerable occupants are affected, call for an emergency repair.
Overflowing Toilet
An overflowing toilet creates panic disproportionate to the actual severity because the water is contaminated and rising. In most cases it’s a blockage rather than a plumbing failure and can often be resolved without a professional visit.
What to do immediately:
Don’t flush again. The instinct is to flush and hope it clears — but if the toilet is already full, a second flush adds more water and guarantees overflow onto the floor. Lift the cistern lid and push the float valve down or close the fill valve to stop more water entering. Locate the isolation valve on the supply pipe to the toilet — usually a small tap on the pipe from the wall — and turn it off.
Try to clear it yourself:
A plunger resolves the majority of toilet blockages. Use a flange plunger rather than a flat cup type — the flange creates a better seal in the toilet outlet. Push down slowly to form the seal, then pull up sharply to create suction that dislodges the blockage. Repeat several times. If you don’t have a plunger, pouring a bucket of warm water from waist height into the bowl sometimes generates enough force to shift the obstruction.
If plunging doesn’t clear it and the blockage keeps returning, call a plumber. Persistent blockages can indicate a problem further down the waste pipe or in the soil stack rather than a simple obstruction at the toilet outlet — something that needs professional equipment to diagnose and clear.
Leaking Radiator
A leaking radiator creates a puddle on the floor and looks alarming, but it rarely qualifies as a genuine emergency unless the leak is severe and you can’t contain it. Most radiator leaks come from the valve connections at either end rather than the radiator body itself.
What to do:
Place a container under the leak and towels around the base to protect the flooring. If the leak is coming from a valve, try tightening the nut gently with an adjustable spanner — a quarter turn is often enough to reseal the joint. Don’t overtighten as you risk cracking the fitting or stripping the thread. If tightening doesn’t stop it, turn the valve to the fully closed position to isolate that radiator from the system. The rest of your heating continues working normally with one radiator out of service.
Book a standard appointment for the repair. A leaking valve typically needs repacking or replacing — a straightforward job that doesn’t justify emergency call-out rates.
No Hot Water
Loss of hot water without a total boiler failure can have several causes depending on your system type. On a combi boiler, the issue is usually the boiler itself — check the steps in the boiler failure section above. On a system with a cylinder, the problem may be the immersion heater, the motorised valve, or the cylinder thermostat rather than the boiler.
What to check:
If you have a hot water cylinder, check whether the immersion heater switch is on — usually a separate switch on the wall near the cylinder, sometimes in the airing cupboard. If the immersion works but the boiler isn’t heating the cylinder, the motorised valve or cylinder thermostat may have failed. These are standard repairs that don’t need an emergency call-out — you have hot water from the immersion as a temporary solution until the repair is booked during normal hours.
When Is It Actually an Emergency?
Not every plumbing problem justifies an emergency call-out. Knowing the difference saves you money and ensures emergency plumbers are available for genuinely critical situations.
Call immediately if water is flowing uncontrolled and you can’t stop it by closing the stopcock or isolation valves. If you smell gas — leave the property, don’t touch any switches, and call the National Gas Emergency line on 0800 111 999 before calling a plumber. If sewage is backing up into the property. If a leak is near or affecting electrical installations. Or if loss of heating or hot water puts vulnerable occupants at genuine health risk.
Wait for a standard appointment if you’ve successfully stopped the leak by closing the stopcock or an isolation valve. If one radiator is leaking but you’ve contained it and the rest of the system works. If the boiler has failed but you have alternative heating and hot water through an immersion heater or electric heaters. If a single tap is dripping. Or if a toilet blockage won’t clear but you have another usable toilet in the property.
The general rule: If you’ve contained the problem and nobody is at risk, it can wait for a standard appointment at standard rates. If water is still flowing, gas is involved, or vulnerable people are affected, call now.
Know Your Home’s Plumbing
The single most useful thing you can do before any plumbing emergency is familiarise yourself with your home’s plumbing layout now rather than searching for it in a crisis.
Find your stopcock and confirm it turns freely. If it’s stiff, work it gently back and forth over several days to free it up — a seized stopcock during a burst pipe is the worst possible timing for a valve that won’t budge. Locate the isolation valves on your toilets, basins, and washing machine. Know where your boiler pressure gauge is and what the filling loop looks like. Know where the condensate pipe exits the building.
The Medway Towns’ housing stock varies enormously — a Victorian terrace in Rochester, a 1930s semi in Rainham, a post-war house in Strood, and a modern property in Walderslade all have different plumbing layouts and access points. Ten minutes familiarising yourself with yours now means you’ll handle any future emergency calmly and effectively rather than searching for the stopcock with water running across the kitchen floor.
If you need an emergency plumber in Medway, call us. We respond quickly, diagnose properly, and fix the problem right the first time.