plumbing laws

[llamedos]

hi,i think my system is mains pressure(i turn main stop cock off and all water hot and cold stop), i'm installing a mixer shower in place of the bath i have reduced the 22mm pipe down to 15mm and now ready to run pipe work to the shower,by law do i need to install isolation valves as all pipe work is either under the floor or in the wall,which will be fully tiled,also do i need to install a pressure reducing valve as i already have a thermostatic mixer shower in the en-suite with no problems of water temps or pressure,
many thanks for your time

 

[swbjackson]

If you don't fit isolation valves to the shower the manufacturers guarantee is void. Also what happens if it fails and starts leaking? You'll have to isolate the whole house.

 

[JohnD]

"if"

 

[llamedos]

ok jacko thanks (im jackson aswell)
what do you reckon on the pressure reducing valve and what fittings do i need from where the pipework ends and the shower fittings start

 

[John506]

You dont need a prv