Connecting multiple wastes - use of AAVs

[spada01]

I've going to build two separate waste runs that meet and go into one 50mm pipe before hitting the SVP. I'm going to run:

1. Shower waste (40mm) into 50mm then later connect a 32mm sink waste into this then to join 2. below in 50mm pipe

2. Sink waste (32mm) then this will go into a 50mm pipe and will then take the 40mm bath waste then join with 1. above in 50mm pipe.

It needs to be part H compliant and pass building control. Will it be sufficient to fit Antivac bottle traps to each sink and have the SVP venting externally through the roof?

Also, can I connect 4 items into one 50mm pipe?

 

[breadnbutter]

u can have 4 connected to 50mm ,any more u need branch ventilation

 

[spada01]

Thanks mate