soil stack

[Frank Jackson]

Hi, if i install a downstairs toilet, connect soil pipe to existing waste ( 3m away), do I need a soil stack to vent new toilet waste, or something else?

 

[DTG plumbing]

Might need an air admittance valve and stub stack, depending on what your neighbours have got on there's and if your connected to same drains, Somewhere there has to be a vent.

 

[mike-c]

An A.A.V should be sufficient above the highest spill level of your appliances fitted in the room.