WC Waste Fall - 1 in ?

[luke_vibert_uk]

I'm in the midst of looking the posibilities of relocating the WC in our Bathroom.

Whats the reccomended Max/Min fall of the WC waste pipe...fully laden? 1 in ?

Just want to see if the potential modified route is going to work or not...

Cheers in advance.

 

[Bahco]

If I remember rightly from college it is around 18 mm to 90 mm per metre.

As a rough guide though 1 in 40 gradient for WC and 1 in 60 for guttering.

See if my memory is right with other replies.

 

[Nige F]

1in 40 for underground drains ..plastic drain/soil can go less..(.so can gutter...level, even)