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Plumberpro
Plumberpro, Plumber
Category: Plumbing
Satisfied Customers: 634
Experience:  Heating and plumbing answers. 20 years experience
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Installing a new central heating system into a 3 bed semi detached.

Customer Question

installing a new central heating system into a 3 bed semi detached. Comb boiler system with 9 rads in total. Can i use 22mm speed fit pipe for the flow return with 10mm feeding off from the T joints to the individual radiators? Or would 15mm flow returns be better?
Submitted: 1 year ago.
Category: Plumbing
Expert:  Plumberpro replied 1 year ago.
Hi 15mm is the standard, but 10 mm would work as long as the runs are not over 3m..
Customer: replied 1 year ago.
Is the 22mm main flow and return acceptable as well or should this be 15mm?
Expert:  Plumberpro replied 1 year ago.
Hi , I would definitely keep that 22mm