sink outlet and gully trap

[AJH]

I cannot see anything in the wiki so maybe someone can tell me what I need to make a new connection from a 40mm plastic sink waste into what gully trap and thence discharging into an existing foul water inspection chamber?

Also is the work building regs notifiable

AJH

[Andrew]

Not if you do it properly.

Just core drill into the inspection chamber so that the hole is above 'high tide mark' and seal with silicon. Make sure you have a downfall, but not too steep all the way.

The trap under the sink will provide the necessary smell trap.

[tabbypurr]

if it's Victorian, nothing. Just end the pipe above the grille.

[AJH]

Sounds too easy, I was assuming there would need to be a separate gully trap outside before the connection to the inspection chamber.

AJH

[tabbypurr]

then they'd compete as to which lets foul gas through

NT