Insulated hot and cold water pipes?

[Alan Ambrose]

I've been looking at these Geberit FlowFit Pre-Insulated pipes to use as supply pipes to the bathrooms running in a 50mm service cavity. Probably 20mm ID to bathroom and split locally to taps / bath / showers? (Kind of assuming there's nobody else in there when someone is taking a bath/shower). I've highlighted the ones that have max insulation but just fit in my service cavity. No need to insulate cold? Anyone have any thoughts?

 

https://www.pipestock.com/geberit-flowfit-pre-insulated-system-pipe-blue-coils

 

 

[JohnMo]

2 hours ago, Alan Ambrose said:

Probably 20mm ID

That's ok for cold, but you will waiting for ever for hot to arrive. I used a 15mm pipe from cylinder to a central manifold then 15mm to each wet room then split it to each outlet in the room. I would keep it simple just use Hep2O and add insulation if you have a secondary return system in place. Maybe some thin insulation if you feel you need it otherwise.