I am adding a new upstairs cloakroom to my house. I need to add a handbasin and will be concealing the copper water pipes and plastic waste pipe (32mm) in a partition wall (don't have the luxury of an outside wall!).
This means that the waste will have to drop vertically inside the partition wall until it gets below floor level (<1m drop) before it will then have a gental slope to the outside wall (~2m away) in the void between ground floor ceiling and upstairs floor.
Is this short vertical drop OK or does it contravene regs? I can possibly put a bit of gradient on this drop but not a lot. Is a 90deg elbow between vertical and horizontal runs OK or will I need a radius bend?
Any help muchly appreciated!
This means that the waste will have to drop vertically inside the partition wall until it gets below floor level (<1m drop) before it will then have a gental slope to the outside wall (~2m away) in the void between ground floor ceiling and upstairs floor.
Is this short vertical drop OK or does it contravene regs? I can possibly put a bit of gradient on this drop but not a lot. Is a 90deg elbow between vertical and horizontal runs OK or will I need a radius bend?
Any help muchly appreciated!