Yeah it’s a grey water macerator .

Unit on left is the sink where macerator has to go . Next to that on the right will be washing machine .

As you can see my waste pipe angle is too tight - by the time I get inside the sink unit I’ll be on the floor .

You’re not meant to use 90’s ( I can cut that 135 off the end if need be ) . Can’t reposition vertical pipe due to wall and lesser ceiling height .

Just stick a 90 where that 135 is and hope for best ? 

If I cut that pipe short . Weld a 135 . Go along a bit 🙄 ; then do another 135 into a 135 - that’ll work yeah ? ( because I haven’t got a (expletive deleted)ing clue )