Hey guys & gals. It's all changed since I was in the trade (sparks). We're moving house soon & I'm doing a budget (because we're on one!). I was gonna use the 'plastic pipe' for ease to install with copper to rads & boiler (used speedfit in the past). I see there's BPEX, PE-X & Polybutylene. Which do I use for what? I'm putting the tails to where the plumber will be **** the boiler install. So what pipe for heating? Same for hot water? What about cold feed for kitchen - different or same? Many thanks.