Table Y tube.

[cartooncat]

Hi,
first post. I've got a shower to put in on a mains pressure system which involves a longish awkward run through a crawl space. I want to use copper, but it is going to be almost impossible to make any joints in the run. Can I use table Y annealed copper tube to avoid joins? Is this OK on mains pressure?
Also, the water heating is an unvented system, so I know I can't work on the cylinder/safety valves etc, but I assume I can still add the shower supply teeing into the existing hot and balanced cold pipework myself.

 

[ChrisR]

All assumptions correct, but most would use plastic pipe there. You can put it in with the help of a fishing device, cable stylie.
Table Y copper is fine till it kinks!

 

[cartooncat]

thanks for the quick reply Chris.
for the second part of my bathroom refurb, I have to add a radiator and move a basin. What are the regs these days regards burying the pipes for these in a floor screed. The rad pipes would be plastic coated 10mm, and for the basin hot and cold I was thinking blue plastic coated table Y 15mm.

 

[doitall]

Hot and cold waterpipes must be in a duct or flexible conduit.

do a google on hep barrierpipe in conduit (cxxx) I think