Copper waste to soil stack

[kbst]

Hello,

I'm fitting a bath and it appears it has 28mm copper waste pipe from the Cast Iron bath with a compression fitting to the plastic soil stack.
What are the options of adding a strap on boss so I can fit 40mm waste pipe, is it a simple straight forward swap... the soil stack is awkward to get to but thats another issue...

 

[Bahco]

Can't see why you are asking?

The trap from the bath will be 40 mm so do the lot inc waste pipe in 40 mm and use a strap on boss.

More HERE

 

[kbst]

Thanks, the main issue I was asking whether I could just add a strap on boss to the soil stack without drilling a bigger hole because the stack is difficult to get to...... Currently the waste is 28mm copper pipe, which enters the stack via a compression fitting...

Thanks

 

[Bahco]

The hole needs to be around 50 mm I'm afraid.