How long can soil pipe from the toilet to the soil stack be? And can it have a bend?

[fknMarko]

I’ve included a sketch of roughly how I want my soil pipe to be routed. I’ll need to use an s-trap for the toilet so the pipe goes straight down through the floor and into the kitchen below before bending it back into a near-horizontal sloping pipe (1/80 gradient) that runs along the edge of the kitchen ceiling. Then I’ll need to bend it towards the soil stack. There should be enough height available to accomodate the slop gradient along all length. I’m just wondering if the length of he piping is too long, or whether the bend will make it too ineffective.

Thanks!

 

[WC1]

I'd watch a few YouTube's and do a bit of googling. The regs are readily available and fairly simple. 1 80 is fairly flat but it'll have plenty of push from the fall from the cistern. How are you connecting it at each end? Why do you have to use an s bend. The s bend is in the wc. Avoid flexible connections to wc pan.

 

[fknMarko]

I'd watch a few YouTube's and do a bit of googling. The regs are readily available and fairly simple. 1 80 is fairly flat but it'll have plenty of push from the fall from the cistern. How are you connecting it at each end? Why do you have to use an s bend. The s bend is in the wc. Avoid flexible connections to wc pan.

Sorry, bad wording... I mean I’ll have to use an s-trap type toilet, because the wall the toilet is against is the party wall between me and my neighbour.

Not sure how I’ll connect at the soil stack end yet, will need to plan that out

 

[ShaunCorbs]

You can go for a decent distance normally around 20mm a meter is about right you can go upto 25mm a meter max or 15mm a meter min

 

[exedon2]

The old rule of thumb was drainage fall should be 1 in 10 x the diameter
You can get away with a bit less with plastic pipe due to smooth bore go to flat and solids won't clear.

 

[WC1]

I think the outcome is that there is nothing particularly wrong with what you suggest.