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thanks for the replies. the tank has its own stat which when turned down still allows the heating to run, does this suggest a 3 port valve?. i spoke to the previous owner and he said 2 years ago the heating was working fine but the hot water was inopp and he was sure that they had to replace a...

just moved and new house has old heating system. i drained cleaned and chemical flushed it etc and its bouncing hot. The pump was noisy so replaced it and now i,m kicking myself 'cos it and the motorised valve are under the f/room floor and i didnt take much notice of it with the floor up, i,m...

ok have got a measurement. the thread on the top of the valve appears to be 1" and the huge nut is 1 2/16" or 29mm

so we have a 70s open baxi heating system and the upstairs rad out valve ( cheapo chrome looking thing) started to leak through the spindle and its loose ratling and no tightening of the gland helped, its goosed. the bottom pipe is 8mm but the very thin thread on the valve to the rad is a big...

thanks gas112, it does appear to be the flow is ok as both inputs to rads are too hot to touch but other side is just warm. i assumed by the fact that after draining both rads refilled quickly but are really slow to heat up

so once again 2 of the upstairs rads have much reduced return flow. this happened a few years back and a plumber (sadly now retired) used a hand pumped pressure bottle to blow down one of the rads return (after draining the rad and attatching the bottle to the threads of the valve usually...

thanks guys, they do unscrew, managed to get a grip with a bit of duct tape. pity i chipped the cap, should have come here 1st!!!!

:oops: hi folks, i installed the taps a few years back, but the basin cold is seizing . they are victorian style 4 arms accross type with a ceramic oldie worldy cap, i have tried without success to pry/ping em off and now have chipped the ceramic, what am i doing wrong???