So I'm trying to finalise services through the KORE slab and would like some help on heat pump and manifold connections please.   So, for context, the house is masonry (250) cavity on kore slab to passive standard. ASHP will sit outside the plant room at the rear of the property.  UVC and buffer tank in plant room. UFH manifold in centre of house under stairs.   Two questions:   1.  ASHP flow and return, is it: (a) 32mm pre-insulated FR pipe through f