Okay, I just had my plumbing rough-in inspection from my basement bathroom and I ended up with a B plus Something I really didn't want but let me help you learn from my mistakes I'll go through them quick here There's my Backwater preventer Here was a couple of money first mistakes One is I I have a tea a Sanitary tea laid on its side which is a no-no for joining the main Forance line that Should be a Y joint And it should come off at a 45 angle here Like this Also next next problem this Rubber elbow even though they sell those at Minards they are not code for anything So I have to replace that with a PVC part there The rest of my Buried pipe was okay Except for another area here line that goes to the shower this vertical Pipe here is the vent I connected it to the waistline with a Rubber tea and that again is a is a non-code Compliant piece so I have to replace that with a PVC sanitary tea This was my dumbest area I just didn't think that's a shower Stubbed out, but I need a Petra in there Next comes the vent line for the Toilet So on the floor there you see the stub out for the toilet And then the right you see the stub out for the sink And then the top horizontal pipe is the vent For the toilet and that comes and it meets that Vertical pipe there which is the vent for the sink My issue here is that that Toilet vent that top or the horizontal pipe needs to meet That vertical vent pipe About a foot and half higher That needs to be above the overflow Of the sink which will go there So imagine how tall your sink will be on the top of the sink That toilet vent pipe needs to meet That vertical vent pipe above that point so the standard height for that I guess is 42 inches That covers pretty much all scenarios So anyway that's my trouble Hope you can learn from it