Supco Piercing Service Valve for all vending machine refrigeration systems including: Dixie Narco, Vendo, FSI, USI, AMS & Royal Vendors Vending Machines. If your machine is not cooling to 40 degrees and the evaporator is iced up. Than normally the system is low on refrigerant and has a leak. The purpose of this piercing valve is to charge refrigeration unit. These normally install on low side pig tail of compressor and takes 5 minutes to install!

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