There is a nipple in the center of the valve which should push the schrader valve in to allow liquid or refrigerant to flow through. This nipple is too short for it to miss.
๐ฌ๏ธ UView Airlift Cooling Checker 550000
9 Review
๐ UView 560000 Combustion Leak Tester: A Reliable Tool for Efficient Diagnosis
9 Review
Enhanced Elitech ILD-300 Infrared Refrigerant Leak Detector: Advanced HVAC Halogen Tester with Selectable Gas Functionality
9 Review
๐จ Robinair (15115) VacuMaster Single Stage Vacuum Pump - For Efficient Single-Stage Vacuuming, Delivers 1.5 CFM
9 Review