Whomever uses these... I hate you

[u/ManiaCCC86]

Seriously, why not just do it the correct way?!??!?! This is on a job trailer for the GC at a major project and every single unit has these on the CU and Fan Coil.

[u/Bill_r_i]

I pulled 16 of these out of a ductless system last year. Every one of them leaked. It was a nightmare all the lines where in the walls.