Annker Posted June 10 Share Posted June 10 Looking for some design feedback. I have serval waste connections to make at ground floor level. Kitchen sink, disk washer and washer machine. Previously (many years ago) I would have just ran the 40mm waste through the external wall at high level (~1m) and then connected to the main 110mm drain run via a gully trap. I understand this arrangement is currently considered old school but regardless it is not suitable on this current job as I cannot have external surface fixed pipe work at this location. Reading previous topic I have came up with the design below. I'd appreciate if anyone can critique or suggest improvements. TIA. Link to comment Share on other sites More sharing options...
Conor Posted June 10 Share Posted June 10 You need to bring the 110mm pipe up to the floor level with a 90⁰ long sweep rest bend. I section chamber on the outside where it connects to the main runn for rodding, rather than a rodding point on the inside. 2 Link to comment Share on other sites More sharing options...
Annker Posted June 10 Author Share Posted June 10 1 minute ago, Conor said: You need to bring the 110mm pipe up to the floor level with a 90⁰ long sweep rest bend. I section chamber on the outside where it connects to the main runn for rodding, rather than a rodding point on the inside. I suppose that helps that rodding and resulting wastes is outside the building. Link to comment Share on other sites More sharing options...
Temp Posted June 10 Share Posted June 10 +1 We just brought 110mm up through the floor under the kitchen sink and used a rubber (?) adaptor down to 40 or 50mm. We have inspection chambers on all 110mm junctions outside. I think all other rooms such as the downstairs WC have 110mm stub stack with AAV. 1 Link to comment Share on other sites More sharing options...
joe90 Posted June 10 Share Posted June 10 Or like I did…(sorry about the CAD {crayon assisted drawing}. 1 Link to comment Share on other sites More sharing options...
dpmiller Posted June 10 Share Posted June 10 ^ back entry gully trap for the win. 1 Link to comment Share on other sites More sharing options...
Annker Posted June 10 Author Share Posted June 10 5 hours ago, joe90 said: Or like I did…(sorry about the CAD {crayon assisted drawing}. 3 hours ago, dpmiller said: ^ back entry gully trap for the win. From reading here I know some people are fans of BIGT. Perhaps I don't fully understand their function but doesn't the BIGT still have to connect to the main drainage run via an Inspection chamber? I understand the BIGT provides a trap but is it not easier to provide the trap internal of the sink waste? Link to comment Share on other sites More sharing options...
joe90 Posted June 10 Share Posted June 10 34 minutes ago, Annker said: is it not easier to provide the trap internal of the sink waste? I still had internal traps and the external one makes a good grease trap. 1 Link to comment Share on other sites More sharing options...
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