access branch downstairs toilet

[jfb]

I have a downstairs toilet where the 110mm waste pipe comes up in the corner of the attached plan.

I am looking to get an access branch that allows me to take the toilet waste and the kitchen and toilet sink waste as well. 

I was thinking of  getting this :

https://www.toolstation.com/access-branch-110mm-9250/p26539

Access placed on top. Toilet waste would go into one side branch and 40mm waste into the other 110mm branch via a 110mm to 40mm reducer.

Does that sound sensible?

 

[ProDave]

No you want something like this.  https://www.ebay.co.uk/itm/192310256435?ViewItem=&item=192310256435

 

Only chose ebay as an example for ease of searching.,

 

The one you chose would not have a swept bend for one inlet.

 

And you should really continue the stack pipe up a bit to an air admittance valve.

[Onoff]

Is he going to want anti siphon traps on the kitchen & wc sinks?

[jfb]

That makes sense Dave. I thought i wouldn't need an AAV as the longer branch that goes to the upstairs bathroom will vent through the roof (off mains, have STP installed). The two branches join at a y junction about 2 metres from downstairs toilet. 

I'll have to look into anti syphon traps.