Lowside Professional Snap Coupler 134
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- 1/4" fitting to connect to R12 gauges
- Converts R12 manifold gauge set to 134a gauge set
- --attach to blue hose on manifold, insert on low pressure side (Big Line)
- snap coupler down to read pressure, or install refrigerant in system.
- if coupler does not fit on fitting, you are connecting it to the high side fitting. This fitting will only fit on low side R134a fitting
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