2 black tank flush valves into 1

[rimmer]

I have a 2024 montana 381TB (2 baths) so 2 black tank flush valves that i would like to hard plumb together to the septic as i am at a seasonal site year round. any recommendations/instructions as i am new at this. Thanks

 

[Carl n Susan]

You need this puppy.
Camco RhinoFLEX Wye 39812
https://www.amazon.com/Camco-39812-...ocphy=9032424&hvtargid=pla-435670940344&psc=1