Cheers chaps, I'll have a look at the hep2o ones in that case. The new system is going in a ground floor attached garage adjacent to my hallway. So fitting all the central pipework into the hall under that floor which will only ever be laminate. Then drilling through into the garage which is a foot lower on floor level.... I had thought about hatches as wanted to fit polished porcelain... But there are other connections I'll always need access to. Including in wall connections dropping down to elbows and 10mm to 15mm where I've fitted up the wall into a central placed box (behind rads).