... yes, I do know I shouldn't have to do it often, and yes, I know it's probably a sign of a problem. But the whole system is up for a rework next summer, so in the meantime...
(and I discovered this morning that the **** builder we had last year turned one rad off so hard I needed a spanner to get any water through it at all)
A bunch of our rads don't have a bleed screw. In the end where there ought to be a little square headed screw there's a stump. (perhaps that builder again...) And they seem to be the kind of rads. where the bleed screw is tapped into the end of the rad., not into any kind of fitting.
What's the best way of getting the accumulated air/hydrogen out? I'm toying with the idea of a small drill, followed by a self-tapper with a fibre washer around the stem.
Long term I think the rads are scrap.
Andy