Recommendation the flow and rtn pipes from Ashp to manifold

[nickw]

As per title , any good or bad ones out there to watch for , will need approx 12m run.

[jack]

Main things to consider are:

- diameter (we went for 28mm pushfit plastic)

- insulation (90% of our ~9m runs are through the middle of the insulation under our slab. Alternatively, you can insulate with nitrile rubber, or buy special pre-insulated ASHP pipes, although the latter is expensive)

- oxygen tightness (copper is fine, as is plastic pipework with an oxygen barrier)

 

 

 

 

[Nickfromwales]

Primo Duo is the norm for me if installing where the pipe is subterranean.  

[nickw]

thx guys