emergency
Radiator leak — Same-Day Plumber Across the North West
Don't let a leaking radiator cause lasting damage to your home; we can fix it reliably.
In short
A leaking radiator often signals a component failure requiring professional attention. Turn off the heating and contain the leak to prevent water damage. Our engineers will diagnose the cause and provide a clear plan for repair.
Tell KJ what's wrong
Free and no obligation — we'll get a qualified local plumber on it.
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KJ
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Hi, I'm KJ — honest UK plumbing advice, free, and a local plumber when you need one. Tell me what's happening — leak, blockage, boiler, emergency, anything — and I'll help you sort it.
You can send a photo, short video, voice note or share your location — whatever's easiest. Please avoid sending faces, documents, house numbers or payment cards in photos.
For genuine emergencies call 01706 318200, or the National Gas Emergency Service on 0800 111 999.
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Immediate steps to keep you safe
Turn off your heating system
Switch off your boiler immediately to prevent further hot water from circulating through the leaking radiator, reducing the amount of water escaping.
Temporarily contain the leak
Place buckets, towels, or old sheets under the leak to catch escaping water and minimise damage to flooring and furnishings. For small leaks, a jubilee clip or self-amalgamating tape can offer a temporary seal.
Identify the source (if safe)
Carefully observe if the leak is from the radiator body, a valve, pipework, or a bleed point. This information can be helpful when you speak to us.
Ventilate the area
If significant water has escaped, open windows to help with drying and prevent dampness, particularly if the leak is in a carpeted or wooden floored room.
Common causes
What's usually behind radiator leak
Corrosion inside the radiator
Over time, the internal metal of older radiators can corrode due to oxygen in the system, leading to pinhole leaks. This is more common in systems not properly maintained with inhibitors.
Faulty radiator valve
The gland packing or seals within the radiator's inlet or outlet valves can degrade, causing water to escape, especially when the valve is adjusted or if it's old.
Loose pipe connections
The nuts and olive fittings that connect the radiator pipes to the valves can loosen over time, often due to expansion and contraction, or improper initial tightening.
Damaged bleed valve
The small bleed valve used for releasing air from the radiator can sometimes fail, either due to corrosion, being over-tightened, or being left loose, resulting in a slow drip or a steady stream.
Pressure issues
Excessive pressure in the heating system can put strain on weaker points in the radiator or pipework, sometimes exacerbating existing vulnerabilities and leading to a leak.
How KJ handles this
What happens when we're on-site
- 1
Safety assessment and isolation
The engineer will first ensure the area is safe and, if necessary, isolate the specific radiator or fully drain the system to prevent further water loss.
- 2
Detailed leak detection
Using industry-standard techniques, our engineer will precisely locate the source of the leak, distinguishing between pinholes, valve failures, or pipework issues.
- 3
Diagnosis and solution proposal
Once the source and cause are identified, you will receive a clear explanation of the problem along with a written quote for the most effective permanent repair.
- 4
Professional repair
Upon your approval, the engineer will carry out the necessary repairs, which might include replacing a valve, sealing a pipe joint, or, in some cases, advising on a radiator replacement.
- 5
System checks and recommissioning
After the repair, the heating system will be refilled, bled, and thoroughly checked for leaks, ensuring it operates correctly and efficiently.
Where we cover
North West England — same-day where possible
FAQ
Frequent questions
How quickly can you attend to a radiator leak?
As a radiator leak is considered an emergency, we aim to dispatch an engineer to you as swiftly as possible, often within a few hours, to minimise disruption and damage.
Can I simply tighten the leaking part myself?
For very minor drips from connections, a gentle tighten might help temporarily. However, overtightening can cause more damage, and leaks from the radiator body or internal valve components require professional attention.
Will I need a new radiator if it's leaking?
Not always. Many leaks are repairable by replacing a faulty valve, bleed nut, or sealing a pipe connection. If the leak is from the radiator panel itself due to corrosion, then a replacement radiator is usually the most economical and lasting solution.
What is the cost for you to come out and look at my leaking radiator?
We charge a fixed £50 diagnostic fee. This covers the engineer's visit to your property to assess the leak, identify the cause, and provide you with a written quote for the required repair.
My radiator only leaks when the heating is on—why?
This often points to a pressure-related issue or expansion of materials. As the system heats up, components expand, and pressure rises, which can expose weak points such as failing seals or micro-cracks that are not apparent when cold.
Should I try to drain the radiator myself?
If you're unsure how to drain a radiator safely, it's best to wait for our engineer. Incorrectly draining a radiator can cause more leaks or airlocks in your system.
Ready to get it sorted?
Tell KJ what's happening and get a plan in seconds.
Photos, video and voice notes welcome. Vetted local engineers · no call-out fee · written quote before any repair.