December 8, 2025Dec 8 1 hour ago, SimonD said: Pls see @MikeSharp01 comment below which clearly says it better than I ever could. Thankfully he woke up this morning with a clear head, unlike you and me that get into discussions late at night when we should probably be getting some sleep, or at least I know I should've been! 😁 He uses his words well lol.
December 8, 2025Dec 8 5 hours ago, MikeSharp01 said: Yes that makes sense. So "b. be a separate branch pipe with no sanitary appliances connected to it;" means (not implies) the D2 pipe is a branch pipe itself? Hope that helps @Nickfromwales I only ever do a pair of D1 max into one D2 and that goes to one trap on one branch off the stack where practicable. Theres no problem if its a 40mm pipe coming off that picks up more than one trap, and the other traps collect water from appliances. See here where D2 is on a 40mm run that picks up both discharges from the softener that sits in that chair. Nowt wrong with this setup.
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