Ensure reliable operation and extend the life of your refrigeration and HVAC/R systems with the Castel DF303/3 (4303/3) Dehydrator Filter. Engineered in China, this compact filter features a 3/8" SAE male connection and a solid‐cartridge molecular sieve providing 50 cm³ of desiccant volume. Designed to remove moisture and acidic by-products, it prevents...