Sorry if I wasn't clear yes I would be fitting the boiler and its on 22/15mm so no problem there, I was just thnking of the future as theres a lot of micrbore around here. I have read a lot of the threats on here about them and they seem generally very positive but have never used one myself. My local TP branch has one they ordered in error that they will let me have for £350 inc vat which sounds like a bargain so I think I'll go for it.