Chasing basin waste pipe

[GotWood]

Can someone kindly advise on whether the following chase for a bathroom waste is possible/sensible please? For informstion, the building is 1880's redbrick "mansion" split into flats (we are the 3rd of 4 floors).

View media item 33177
I had been considering connecting the waste to the toilet pan connector but this is proving tricky with a back-to-wall pan.

Many thanks.

 

[Bahco]

Will this be any good to you.

 

[GotWood]

Thank you, but sadly not

I will be installing a back-to-wall pan, and the soil pipe will extend into the back of the toilet. This means there is very little/no room to get the basin waste pipe into the back of the pan to meet the connector.

Anyone else?

 

[GotWood]

Anyone? Pretty pleeeaase

 

[Bahco]

Sketch not very good but.......Why do you need to chase it out as 40mm is a lot to take out of a wall

 

[GotWood]

Hi Bahco,

I intend to box in the 120mm window recess so I can conceal the toilet cistern (not shown on the sketch) and the basin pipework. Due to the location of the waste I hope to chase the pipe ino the wall.

If 40mm is too much to chse, I will further explore using a boss on the WC connector as suggested.

gw

 

[Bahco]

Basin waste pipe is 32 mm so you need to chase about 35 mm and I guess that only a short chase won't cause much of a problem.

How long will it be

 

[GotWood]

~ 250mm.

Your response does not fill me with confidence!

 

[Bahco]

Go for it and be a devil!

The house will still be standing!

 

[GotWood]

I will take that as a legally-binding guarantee that it will be fine