Complete 1 System Trane HO Split System. HO stated pvc pipe (1 1/2”) slipped out after I left. More likely hose coming from boiler which goes into same drain ad the hvac, pushed it drain down reason why drain slipped out. Added a strap to get more support to drain. Added more pvc pipe to drain (1 1/2”) and a coupling. Used primer and glue to get pvc secured. Checked again to make sure drain was clear. System is running great at this time.