Pipe insulation for ashp

[JeffGiraf]

Asked this question on anotger thread, but lots going on there, so thought I'd ask separately:

 

What pipe insulation would you use to insulated hot pipes to and from tank and HP?

 

Particularly, how would you go about insulatung the valves, corners and other knobbly bits?

 

The tank etc is all situated in a cold shed so outdoor temps but not exposed.

 

Thanks

[Dillsue]

Anything outside the heated envelope ie everything in the shed and pipes between the shed and the house, use at least 25mm wall thickness. You can buy guides to make accurate cuts but with a bit of practice you can do a pretty good job with a pair of large scissors. Search eBay for pipe insulation cutting guide.

 

For insulating valves and compression fittings use soft insulation a size up from the pipe work, so use 28mm insulation on 22mm fittings. Armflex black nitrile insulation moulds itself very well around fittings. Hold it in place with insulation tape but only tight enough to close up any gaps without overly squashing the insulation