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DiversiTech MSA-45 - Brass Refrigerant Line Adapter for R410 Mini-Split systems - 1/4" Male Flare x 1/2" Female
The MSA-45 is used on the new R410 Mini Split systems that have the larger unique fitting on the service valve. The description of that fitting is 1/4in Male Flare x 1/2in Female UNF. This adapter will screw onto the 1/2in. Acme Male-20 UNF fitting and allow you to connect a standard 1/4in service hose to it.