Could you please cast your informed eyes over my drainage plan, and tell me if I've missed anything.
I've used a NHBC tech sheet for some guidance, namely if I use a rodding point (bottom of the diagram) I can then branch off the main run for Bath and Shower.
The two WC's and SVP will be connected with a Y branch and 45deg coupler to give a larger radius.
SVP will be in the plant room and vented through the roof, I plan to use this for the waste for Utility basin, WC basin, and drain / blow off for UVC (150L UVC)
Lastly I plan to have a walk in tray and want to use this or similar trap which will be connected to the 110mm pipe. (The House slab in the shower area will be left lower, so I can form a tray with screed later.