Hmmm. Exhaust tube goes uphill. Not sure what the manufacturer calls for but my first inclination would be NG..........as in No Good. I know some areas require these exhaust tubes to be plumbed differently but I don't like the idea of sending a TPR tube directly into a drain line as you will not know if the valve is opening which could indicate a defect with the unit it serves.

Also, is that a polybutylene supply line I see in those pics?