Well, the TRV replacement went fairly well but I managed to flood the kitchen!
All the "tails" bar two were the normal straight ones. The remaining two came out very easily despite the fact they had been there for over
30 years!
The tool I bought didn't fit-the hexagonal hole in the tail was smaller than the corresponding hex on the tool-I used a large flat bladed screwdriver instead.
Anyway, when I refilled the system it became apparent that there was air trapped in the boiler so I undid a rather large bleed valve/tap thingumy to let the air out...
Loads of air came out followed by a jet of water. I did the valve up but the water still came. I did the valve up tighter and the water still poured out!
It turns out that the washer in the valve completely disitegrated when the valve was opened-I fould the bits on the kitchen floor.
swmbo was not amused. Ho-hum.
sponix