Thanks again,
Cant hear or feel water moving. The loop is actually silver woven pipe and the tap heads are blue plastic squarish, about 1cm across. They are currently in towards the pipe. When I unscrew (opening I think) they come out about 1/2 cm. This takes about 3 1/2 turns.
System been...
Thanks for that, unfortunatly i had both taps (one at each end) open on the loop. Is that what you meant. Nothing seemed to change. Should the pressure go up instantly or does it take hours .
Hi,
All my upstairs rads were cold at the top so I bled them. (didnt turn boiler off as I didnt know you had to) Managed to get 2 hot up to top then couldnt figure why after a while the next one started sucking. Went out for 2 hours. Came back, 1 that had been hot all over was now half cold...