branch pipes

Hi all, It feels like I’m asking questions daily at the moment! I’ve got two new en-suites going in next to each other either side of a brick wall. I have access to one internal stack running up the dividing wall. Hopefully this sketch makes sense: My idea is to fit a triple branch (see...

Part H table 2 & diag 3. Gradient limits for unvented branch pipes. I understand the reason to put a maximum gradient on - to avoid unsealing traps. (eg washbaisin on 40mm can achieve maximum of 3M on 18mm/M) Is is correct to assume that if the pipe must turn completely vertical for part of a...