Soil pipe headache ! - Surely this is easy to do ....

[Superted87]

Hi guys,

I removed my cast soil pipe and I have a nice old clay pipe in the floor downstairs ready to take some new plastic pipes.

I can come under then suspended floor at a suitable slope to where I want the new pipe to go up the wall. I have a branch in mind for the downstairs toilet which is fine but as it goes up to the 1st floor what do I need to terminate the stack and take a branch in 3" up to the roof vis some discreet boxing and out through the roof. BCO has approved this but I am confused about the order of fittings.

What sort of fitting goes on the top of the 110mm stack ? I want the 1st floor loo to go in to the top of it ideally, then have a branch come in from the side for the sink and bath drains, then the 110mm outlet with a reducer to 3" out of the side. Is this ok ?

Advice is gratefully received as always guys and girls .

cheers

 

[Hugh Jaleak]

I'd fit the WC connection into a 110mm junction side connection, then use a 110mmx82mm reducer in the top socket and carry on upwards with the 82mm (3") to vent. I'd be reluctant to use a side branch below the WC connection for a vent in case it was to collect waste and possibly block. Wastes can either be connected via bosses, or if space is tight, use a manifold.

Need a long radius bend at the foot of the stack dont forget.

 

[Superted87]

Thats awesome thanks mate !