Hand Operated Drum Pump, Metered No, Includes Discharge Hose No, Piston Material Ryton, Features Can be used in both Directions, Seal Material PTFE, For Use With Aggressive Chemicals such as Esters, Alcohols, Bases, Hydrocarbons, Ketones, For Container Type Bucket, Drum, Pail, Includes Bung Adapter Yes, Includes Nozzle No, Includes Spout Yes, Adapter Material Cast Iron, Compatible Chemicals DEF, Deionized Water, Diesel Fuel, Fresh Water, Methyl Ethyl Ketone (MEK), Salt Water Diesel exhaust fluid (DEF) hand drum pumps are used specifically with DEF to maintain purity when filling the reservoir of a diesel engine's Selective Catalytic Reduction (SCR) system. These pumps are certified to ISO standards that regulate the handling, transportation, and storage of DEF. They are used for dispensing.