What is the fall for connecting a 40 and 50 mm Drain into a soil pipe

[Stants]

Hi could anybody tell me or post a link for the correct fall / gradient for a 40 mm and 50 mm drain pipe ( Shower ) connecting into a new soil stack im guessing it would be one in something or degrees

Thanks

 

[Ric2013]

Between 18mm (or is it 22?) and 90mm per metre run is acceptable.

If you want an 'offical source', "Approved Document H".

 

[Stants]

Ok brilliant thanks for that

 

[ShaunCorbs]

20mm-25mm a meter is normal you could go as low as 15mm a meter if you have to but no less

 

[Stants]

20mm-25mm a meter is normal you could go as low as 15mm a meter if you have to but no less

yeah thanks I read the document H and have worked to go with the same angle as the boss adapter is set too ( 2.5 degrees ) so I've got a 40 mm pipe and a 50 mm pipe one above the other

40 mm run is 600 mm which gives you a fall of 26 mm
50 mm run is 1400 mm which gives you a fall of 61 mm
so for aesthetics they will run the same angle ( be parallel to each other ) that does come in the range of minimum 18 and maximum of 90 does that sound ok

 

[ShaunCorbs]

Yep sounds ideal

 

[Stants]

Yep sounds ideal

cheers brilliant