Double WC branch to soil stack

[Jimmy_shy]

I've searched this site and all over the shop, but can't seem to find out if the thing I want to do is unusual or wrong. In planning the first floor bathroom and ensuites etc, I need to discharge two WCs into the soil stack. Question - is the correct way to do this via a double equal branch (which Plumbase sell but the geezer on the phone said they didn't sell many!) into the stack, or two stacks, or some off-set separate connections, which would seem to bring challenging arrangements for correct falls etc?!

Any help much appreciated

 

[ChrisR]

If the stack is to one side of both wc's then you'd have a horizontalish bit of soil pipe with the pipe(s) coming through the wall dropping down to it.

Vertical is also an acceptable gradient! For a long drop you'd need special bend at the bottom, but not for short drops.

Traditional slope is 1 in 60, =1.5 degrees

If the SP is between the wc's. You aren't supposed to have opposite entries into a SP so I don't know what the fitting's for! Probably in practise there's no problem.

 

[Jimmy_shy]

thanks chris - can two wcs discharge into the same horizontal run of soil pipe on way to stack?

 

[ChrisR]

yes.