GRIFFIN G500DM, G900DM, G1000DM and G1000TM has an unique handle valve control which allows the operator to isolate one filter at a time for servicing, even during engine operation, if necessary. The inlet and outlet fuel ports are 7/8"-14 SAE J514, 37?male flare fittings. The clear water and contaminant collection bowl allows the operator easy to check water and solid contamination. A standard Griffin vacuum/pressure gauge is to indicate the timing for replacement of the element. ========================== We produce various kinds of Fuel Filters: Auto Filters,Marine Fuel Filters,Turbine Fuel Filters, Replacement for Racor Fuel Filters,Filter/Water Separators,Fuel Purification Systems,Engine Fuel Filters,Truck Fuel Filters,Car Fuel Filters,Replacement Elements For Fuel Filters MOQ: USD1000 FOB Jiangmen China