Your design seem fine as you are carrying out a one pip system. Jest make sure
you connect your 40mm bath waste to the lowest point in the branch.....then you
can run your 110mm for pan and use the outlet above the 110mm on the branch to
run your 32mm waste for basin. Doing this will help you from getting any back
flow as there are no cross connection if you get my drift. You can if you so
wish run any shower waste and simply connect to the 40mm bath waste. PLEASE
MAKE SURE YOU PUT IN ANY RODDIN EYES. DO NOT RUN WASTE INTO BASIN USING 90
DEGREE BENDS USE APPROPRIATE T AND INSERT RODDIN EYE JUST TO COVER ANY FUTURE
MAINTENANCE PROBLEMS. IF YOU REQUIRE ANY ASSISTANCE THEN E-MAIL ME ON


REGARDS
Keith