Leaks from a radiator

Question

Water leaks very slowly from a tiny square shaped indented space (look like a square screw) at the bottom of a double panel large vertical radiator that has been installed about 9 years ago. Suspected loosen screw and tried to tighten the square indented space but no suitable size screwdriver found. What is the problem please? Thank you very much.

Sion · Accepted Answer

Sounds like its a bleed plug leaking, but its strange why its on the bottom of a radiator.
Tighten with a vent key, iff that dosent work call a plumber to drain down radiator and change for a plug.

Jiten · Answer

Normally they would be a vent on the top of the radiator but it could be a blanking plug.if it doesn't stop by tightening then the radiator may have to be drained down and a new blanking plug fitted.

Andy · Answer

Might be wrong, sounds like the radiators bleed valve.

Martyn · Answer

The vent plug is leaking, call a plumber to arrange a replacement plug

Saroosh · Answer

It sounds like you're describing the bleed valve at the bottom of the radiator, which is used to release air from the system. If water is leaking from this valve, it's likely due to a faulty seal or a damaged valve.

Here's what you can do:

1. **Turn Off Heating:** Firstly, switch off your heating system to prevent further water leakage.

2. **Check for Damage:** Inspect the bleed valve closely to see if it's damaged or if the threads are worn out. If it's damaged, it might not seal properly, causing the leak.

3. **Replace the Valve:** If the valve is faulty, replacing it might be necessary. You can get a replacement bleed valve from a hardware store or plumbing supplier. Make sure to get the correct size and type for your radiator.

4. **Consult a Professional:** If you're unsure or uncomfortable replacing the valve yourself, consider contacting a heating engineer or plumber. They can replace the valve and ensure it's properly sealed without causing further issues.

When attempting to tighten or replace the bleed valve, it's crucial to use the correct tools and be cautious not to overtighten or damage the valve threads, as this could worsen the leak. If you're unable to find a suitable screwdriver, it might be best to seek professional assistance to avoid causing more damage.

Liam · Answer

With you saying "square screw" I suspect this means the rad tail has started to leak. This means draining the radiator, re-taping the rad tail with ptfe/loctite and tightening back in and then refilling the radiator. Unless you know what you are doing I'd recommend hiring a professional to do this.

Janet · Answer

Vent plug is leaking and needs to be replaced. Get a professional in or you could risk leaking dirty radiator water over your floor!

Pete · Answer

Please try and use a radiator key this will isolate the leak for you
thanks
Pete
Oil Burner Service Engineer

Leaks from a radiator

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