Double waste pipe for two machines

In order to connect two wash machines on the same waste pipe, here a dishwasher and a washing machine, I designed this double pipe. This double pipe is made from 3 separated parts (glued with epoxy glue) and it was designed for a specific case but reusable anywhere (you can turn the pipes before bonding together).
I used PETG material but it could be made from ABS as well. No PLA material!