Performed QA on Goodman Gas Furnace/AC install. Reviewed installation with homeowner. Tested system in heating mode. Tested the wet switch safety and the ez trap safety. Filled condensation pump and tested. Reviewed programming on Cool Cloud and setup the AC which was not programmed. Had to cut condensate drain because it was pitched backwards and the EZ trap was backing up when I poured water through the drain. Completed checklist form in system. When we go back for Six Month inspection we need to cut the drain line before and after the ez trap so it can be pitched correctly and add a Union fitting on the drain near the pump so it can be serviced more easily. I cut the drain so it is draining and not causing an issue until we come back.