plumbing to a 4inch

[Mikest]

I need some help please, hope someone can help.
Im building a ground floor shower/wet room with a toilet sink and a bath.
Currently im at the dpc level and ready to concrete, but i need advice re the pipeing for the bath + shower + sink.

I have a verticle 4inch pipe where the toilet will be.
Should i be plumbing the sink and shower and bath to this pipe? or do i have to dig to main drain line and bring another 4inch pipe to the room to with i should make the connection. Please advise. Should be starting on it in the morning.

 

[Mikest]

Anyone?

 

[TicklyT]

How do you intend your wetroom floor to drain?

I would consider a second 4" pipe at the wetroom floor trap position, teed into the existing 4" pipe by a mini access chamber just outside.

There are wetroom floor traps available that fit straight into the top of a 4" soil pipe.

Boss the bath and basin wastes into either run, or even add another 4" branch from the chamber for them.

Design in rodding access. Sodd's law says If you do, you will never need it, but if you don't, something will get blocked very soon after installation