''Ill upload a picture of the piping that will be getting torn out on Monday and be getting redone.''
It looks like they did not provide unions or flanges at new tank. Drains on piping should have been a typical install.
Basic install where they tried to cut corners and save a few bucks. Sure the pump has flanges, but when you disassemble flanges you're gonna get water all over.
It's these little things that PROFESSIONALS do that the cheap guys do not. They did do a nice job with the unistrut and clamps.