Bottle gully to 40mm waste

[Celeronmanuk]

Sounds like a silly question, but what's the best way of connecting 40mm waste pipe to a 110mm knockout on a bottle gully.

Knockout seems a little shallow for something like this
https://www.screwfix.com/p/mcalpine-drain-connector-110mm/

Is that the best method?

 

[Madrab]

If it was me I'd use a single waste adapter/connector

edited due to the pic being lost

 

[Celeronmanuk]

If it was me I'd use a single waste adapter/connector

So I'm going into one of the knockouts, would that fit? The female with the gasket is already taken by the outlet.

 

[denso13]

So I'm going into one of the knockouts, would that fit?

Think so, they are 110mm boss's and the one linked to above is 110mm.

 

[Celeronmanuk]

Think so, they are 110mm boss's and the one linked to above is 110mm.

Solvent weld then?

 

[denso13]

Solvent weld then?

The connection isn't long enough for anything else really.

The trouble with boss connections is that most, if not all, manufacturers use different fittings/methods - they aren't universal.

 

[Hugh Jaleak]

If you haven't already got the gulley, then get the Screwfix version with 110mm socket on the back inlet, fit a waste adaptor into that, and connect your waste. Otherwise glue the waste adaptor into the knockout then connect your waste.

 

[Celeronmanuk]

Thanks for the replies. Wavin (Osma) are saying you can't use waste pipe underground. Which is interesting as some images show the osma 4d900 gully with a waste pipe size knockout.

This is for sink and dishwasher 40mm waste exiting through the wall and dropping into the side of the bottle gully which isn't very deep. I guess this is only to do with blockages? Was trying to avoid going into the top grill.