Is there any other way to bleed radiators as the little square bit what i put key on to bleed it has rounded off, and the key wont grip it at all, tried buying new keys and tryed mogrips to try turning but nothing happening.

minxymitts, January 2009

I'm not a heating engineer but here's my suggestion.

Off to the local plumbers merchant and buy several cheap rad keys.
(Lot cheaper than new radiators).

Clean the nips of all grease / oil.

Mix araldite and put a little in each key and glue them onto the nips,
bracing in place overnight with screwed up paper towels or similar.

Then attempt to unscrew.

You will need new nips of course.

hondo, February 2009

The plug holding the bleed screw is usually seated on an 'O' ring
Use a well fitting spanner to slacken the complete plug till air and/or liquid passes threads

Asanewt, January 2009