shower waste only 32mm flexy? All aspects of plumbing questions and answers, help, tips and information

[chrisroberts]

i bought a shower tray not so long back and it came with a 32mm flexy pipe built in to the wate outlet. now its fitted im suffering from slow drainage in the tray. i was under the impression shower waste had to be 40mm? if so. how do these companies get away with selling them if its not fit for purpose?

[plumbbob]

You are correct it should be 40mm. I don't know how they get away with it. Designed for another country I suppose, but anyway, I could probably list another dozen or so things that break regs and are sold in the UK. It really racks me off, as if anything goes wrong, I have to put it right, and it ultimately reflects on my workmanship! And makes installation more difficult and costly.

[Skids]

Hi chrisroberts,

Unfortunately they can and do sell any old rubbish, in the eyes of the law, it’s up to the householder/fitter(plumber) to ensure that it is legal.

as pulmbbob said, 40mm ensures good flow.

Anything you buy please ensure it’s ‘WRAS’ approved, if not, do NOT buy, it may cost a few bob more, but at least it WILL work.

Regards

Skids