when im putting new pipe work in for a combi for my flow and return,am i best running a 22mm round under floor boards and cuming off to 15mm,and do the same for my return22mm to 15mm,or would i be best going into 2 manifolds withh 22mm and then out from them with 15mm,my house want 8rads putting in. thanks for any suggestions
intaling new pipe work for combi boiler
- Thread starter uggy10
- Start date
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