Removed water from both hvac & water heater drain pans…. Attempted to clear primary. Recommend two additional shut off valves where HVAC and water heater drain both tee in together. Unable to perform this recommended repair due to not enough three-quarter inch PVC exposed out of wall cavity. (See photo) Tech/installer Will need to have more Three-quarter inch PVC exposed out of wall. so that existing assembly can be cut out to rebuild junction with two new Jones blow out valves (One for water heater and one for AC ) Already Left estimates for new drain pan. Highly recommend a comfort advisor visit. (Evaporator coil, deteriorating/falling apart unable to threat in PVC fitting into secondary discharge port. Therefore, it is leaking onto makeshift drain pan. Also issues with primary drain where it ties into water heater.)