933 Series Duplex Bronze Enclosure

933 Series Duplex Bronze Enclosure



Plumbing systems that require constant filtration but cannot be shut down for filter cleaning, and military or commercial vessels that prohibit plastic components in critical plumbing systems are the ideal candidates for a GROCO 933 Series Duplex Strainer.  Cast bronze enclosures replace the sight glasses, and a centrally located valve diverts system flow to one side of the strainer while the other side is serviced. GROCO 933 Series strainers are designed on the same base characteristics as AARG series single strainers. 

933 Series' oldest ancestor (GROCO HD series strainers) were designed to meet the needs of the U.S. War Deptment for Higgins Boats' landing craft built during World War II.  Their unique patented function played a key part in the amphibious landings of countless American troops throughout the Allied Invasion, and helped to earn the prestigious Army-Navy E Award for Higgings Boats..

Today 933 series strainers are installed in Fire Boats, Coast Guard and Navy vessels, and in homeland security vessels world-wide.





            • Made in the USA
            • ABS compliant with full C84400 bronze construction.
            • No tie rods or gaskets.
            • Easy service with screw-on cap.
            • Patent-pending valve handle has square hole to accept a standard ratchet for improved leverage or greater access.
            • #304 stainless steel filter baskets are standard
            • Monel basket available.




Product Name Thread NPTABCDEOpen Area Ratio

933-0500 Series

1/2" - - - - -54

933-0750 Series

3/4" - - - - -36

933-1000 Series


933-1250 Series


933-1500 Series


933-2000 Series


933-2500 Series


933-3000 Series


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