Review on 🔧 Universal Retrofit Valve 7/16 Low Side Port Adapter for Air Conditioning Systems - R-12 to R-134a Conversion with Blue Dust AC Cap by Michael Crossman

I buy them when I work on cooling systems. More specifically, my old used fridge and coke machine from the 1960s. They attach perfectly to soldered service connectors and faucets. I have refilled my used fridge which was repaired a month prior to purchase but was said to still be leaking. It's easy to fill the system and have a cooling fridge again. Easily connects to the vending machine after a small upgrade of the refrigerant system. Click and fill and we have a cooling machine.