SE/SEF Series Large Engine Strainer

SE/SEF Series Large Engine Strainer


Today's high power engines demand high flow capacity - GROCO SE/SEF Series raw water strainers are up for the job. For installation on the suction side of the plumbing system, and designed with minimal restriction and high flow output in mind, SE/SEF strainers are the ideal solution for large engine cooling needs.  SE-4000 has 4" NPT threaded ports.  SEF-4000, 5000 and 6000 have ANSI pipe flange conections.  The filter basket and screw-on strainer cap have replaceable zinc anodes.



              • Made in the USA
              • For high-powered engines with  4", 5" or 6" intake. 
              • Crystal clear cast acrylic sight glass.
              • Cap and basket have replaceable zinc anode protection. 
              • Low restriction for maximum cooling water flow. 
              • No inside tie rods.  Cover unscrews for easy filter basket cleaning. 
              • O-rings seal all mating surfaces. 
              • All models can be converted to HYDROMATIC (self-cleaning) operation. 
              • Improved cylindrical filter basket. 
              • #304-SS basket is standard with .077” holes  (.125” and .188” hole sizes are optional). 
              • Monel basket is optional. 
              • Bronze flange adaptors are available for connecting pipe or hose to flanged strainers
              • C84400 bronze construction.


  • The installation of GROCO SEF or HSEF series strainers (or any other flanged equipment) can be simplified with the use of our bronze flange adaptors. 
  • F-Series adaptors  match standard strainer flanges while permitting the use of NPT  threaded pipe connection or a pipe-to-hose adaptor for hose connection.
  • 4" (F-4000), 5" (F-5000) and 6" (F-6000) flange adaptors are available.






Product Name Thread NPTABCDEOpen Area Ratio

SE-4000 Series

4"18.4131313.1 -10

SEF-4000 Series

4" FLANGE18.416.512.513.1 -10

SEF-5000 Series

5" FLANGE18.416.512.513.5 -8.1

SEF-6000 Series

6" FLANGE18.416.512.513.9 -6.7

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