Internall sink/bath waste pipe can I do this?

[JayHS]

advice on relocating my externall waste downpipe + hopper and relocate this internally! so not to foul the glass roofline of the new conservatory which will be fitted soon.
30 odd mm standard sink and bath waste.. that both pop outside the wall and into a downpipe hopper.
looking to fit an oversized internall pipe to the same waste pipe in the ground..
there is a 14inch rise of the new conservatory floor when fitted.. so this sink/bath waste joint will be buried at the bottom.
providing i make it with an access point in case of a future blockage
can i do this? as i see no one askking this question on here
any advice would be fab

 

[JayHS]

please advise..
many have read this but no thoughts nor ideas.
where can i go to find out re the OP

 

[Hugh Jaleak]

I would suggest connecting both sink and bath wastes into either a 50mm or 82mm pipe, fit an air admittance valve at the top. This can be run to the drain, fit a bottle gulley with a sealed lid for access and connect the new pipe into the boss on the side.

 

[JayHS]

Hi Hugh Jaleak
many thanks for your thoughts.. I was looking to do this, it is good to see i am thinking along the same lines as others, but I am wondering if this is ok to do? re planning and so on. are there any restrictions for this idea to not work

 

[Hugh Jaleak]

It may be notifiable work under building regs, as you are altering the drains slightly, but I imagine you are replacing a gulley with a sealed access gulley and swapping a hopper for a stack (of sorts) so hardly a major alteration.

 

[JayHS]

yes relocating the external to fit inside the house, and changing the coupling Joint from external to internal, with internal access points for blockage problems and so on, but thats it.. just drilling a hole to fit the pipe through the brickwork, all the rest is able to lay or fit between floor joists without any adjustment.

 

[Hugh Jaleak]

I'd just go ahead and dont tell anyone lol. Its in your interests to do the job properly anyway otherwise it'll come back to bite you on the backside later!

 

[JayHS]

hey.
I think you might be right..
)

 

[JayHS]

Ok Sorted
50mm pipe, solvent weld type to be used.
access points at the top and near the bottom for any future problems as well as 2 vents fitted one to the sink and one to the bath.
and it will be coupled into the same waste as before, as it turns out this was all cracked so just as well i found this. so replacing a little of the claypipe too.