Can I discharge all waste water into the soil stack?

[jazzbhatia]

Hi All,

I have started digging the footings for my extension and have encountered an issue with the plans for the drainage.

Currently the gully that serves the bathroom (tub, sink) and the kitchen sink has its own channel into my neighbours manhole.

My cast iron soil stack (which I plan to replace with plastic) also has its own channel into my neighbour’s manhole.

My plan is when replacing the soil stack I will do the following:

Route the first floor bath tub, wash hand basin and WC into the soil stack
Route the new ground floor WC and wash hand basin into the soil stack
Route the new external kitchen gully into the stack

My question is am I able to discharge waste water from one bathroom (with wc) second wc and the kitchen directly into the soil stack.

Once this has been done it will leave the old gully channel not connected to anything and I will cap with cement as it is in an awkward location.

 

[Fluffster]

No problem routing all grey water and wc discharge into your soil stack. The only issue is if you route surface water into a soil stack unless you have combined drains. BC prefer if you route surface water to a dedicated drain or soakaway.

Pete