Recent content by NiG_21

Thanks for the thoughts guys... Yes there are 22mm pipes running from and to the boiler iteslf and there are two loops in the house (both 15mm) one upsatirs and one downstairs. The problem was with the pump, it had a airlock in it and the impeller was cavitating. If I unscrew the centre...

Hi, I have a Puma80 boiler servicing 7 radiators (3up-4down) and have just replaced some strange microbore plastic pipe which was throughout the CH system (from a bar we think :shock: 10mm Od - 6.5mm Id) with good old 15mm copper piping :). System holds pressure fine, rads are...