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The MARS MSG-4SS sight glass is a reliable moisture indicator used in refrigerant systems. This unit, identified by MPN 65640, features a forged brass body with brass fittings. It has a large viewing area that allows for an easy inspection of refrigerant flow.
This moisture indicator can signal when the refrigerant is low or if there is a blockage.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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