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[harvey03]

i have added a new rad to my 1 pipe system, The system runs 22mm loop with micro bore tee'd off for the exsisting radiators i tee'd into the 22mm pipe with 15mm hep to my new rad but it seems to be cold it did heat up for a bit, All the other heaters are fine. should i have used micro bore like the rest? :x

[htg engineer]

Using 15mm pipe, if anything would starve the radiators that are piped in 10mm.

How long did the radiator heat for ? were the rest heating as normal ?

Where did you put the tee's for the new radiator ?
in relation to the other radiators etc ?