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A charging hose with a built-in low-pressure gauge for topping up car AC systems. The 13mm quick coupler snaps onto R134a service ports, and the color-coded 0-350 PSI dial lets you watch pressure while you fill. It is aimed at DIYers who want to recharge their own AC without a shop visit. Compared with plain charging hoses, the gauge is the main draw; it is a basic single-gauge tool, not a manifold set with high-side readings or vacuum support.
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This is a refrigerant charging hose with a built-in pressure gauge and can tap valve. It connects a refrigerant can to the low-pressure port of a vehicle's AC system. It works with R134A, R12 and R22 refrigerant systems, for automotive and some home AC maintenance.
The color-coded low-pressure gauge reads 0-350 PSI, so you can monitor system pressure while charging. The hose is flexible rubber with corrosion-resistant metal connections. A 13mm R134a low-pressure quick coupler attaches to the vehicle.
Use it on the low-pressure side of the AC system only. Connecting to the high-pressure port is dangerous and may cause injury. Wear protective safety glasses and gloves when working with refrigerants. Run the engine and AC compressor according to the refrigerant manufacturer's instructions during charging.