How do I bleed my bathroom radiator?

[SublimeSelf]

It makes these REALLY loud bubbly noises at night and the gas man did it once when he came to fix the boiler but it has returned. I don't want to call him out just for this. I live in a flat and we have a boiler (I do know where the tap is) in a cupboard and the electric thingies in another. Sorry but can't be more specific ;-) Please help! It's driving me NUTS!

[Loosehead]

At the top of the radiator at the end there will be a small square screw, you need a radiator key which any diy store will stock then use this to undo this screw, do not take it right out, unscrew until you hear a gentle hissing, let this hissing continue until water comes out then tighten it up again, the hissing is air removing itself from the system.

[teash]

Switch off boiler and turn bleed valve on rad (assuming that there`s one on it), until all the air has been released and water starts coming out of vave. Tighten up an hey presto. BTW after this is done just check the water pressure on the boiler and if needed top it up

[gazzawazza]

Don't worry, It's very easy to do.

Make sure the radiators are cool, and take your bleed key and a cloth to the highest radiator in the house. Place the key on the nut (it's a little square one and is usually found on the top corner of the rad on the side or on the back surface) and crack the nut open by turning anti-clockwise. You will start to hear the air coming out. The louder it gets, the closer you are to water squirting out. Be ready with your cloth. As soon as water comes out, close the nut back up and wipe any water up. You may need to go round all the other radiators in the house and then you may to repeat it all again, but when you've finished, make yourself a celebratory cup of tea and switch on your heating.

[gazzawazza]

Wow, three posts in three minutes, it must be a record!

[alanogden]

You also need to know why the gas is getting into the system. It could be formed by electrolysis of two different metals in the system - treat by adding inhibitor or it could be air from fresh water coming in because there is a leak or because the pump is too strong and pushing it into the overflow. Once the water has been heated there should be no more air to come out of solution.

[SublimeSelf]

Wow..Thanks guys! Will try it within the next few days. Thanks again! x