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Thanks but already tried that, still no heat to rads. 22mm pipe going up to loft from heating circuit,only getting hot two thirds of way up,dispite a new bigger pump fitted,25-50-130ups to a 25-60-130ups?

Hi,hope some one can help me,:I have recently fitted two rads in two rooms,but have had to use the loft for flow/return pipes. thus coming down wall with 22mm copper and 15mm tails for rads.I am on a super Q 50/82 firebird oil fired boiler. closed system(expansion vessel) , with a 25-60-130...