Bathroom refit - need a little help with the waste pipes

[plantyroo]

Hi folks

I'm about to embark on refitting the bathroom and I'm looking for some advice/suggestions.

At the moment the basin waste runs along a wall (boxed in) and into a cast iron stack, where as the shower/bath waste runs through the wall and into a hopper outside.

I'd like to run the basin waste into the hopper too, as this would mean I won't have to box the pipe in from the basin to the stack.

The easiest way for me to do this would be to tee into the 40mm waste, but I'm not sure if this is acceptable? If so, can you get 40mmx32mmx40mm tee connections?

What do you think?

Many thanks for the help.

 

[John506]

Yes you may need anti-vac traps though because if you use both appliances it may run full bore in the pipe and pull the traps out.

 

[TicklyT]

I would consider using a 40 X 40 X 40 tee, and fit a 32 X 40 reducer into whichever branch suits the application.

 

[plantyroo]

Thanks for the replies and the help folks.

Can you get a 32mm reducer for a 40mm equal tee from the sheds?