New RV / Marine 12 Volt DC / 12 V DEMAND Fresh Water Diaphragm Self Priming Pump 3.3 GPM 35 PSI 12V Self-Priming Water Diaphragm Pressure Pump 3.3 Gallons Per Minute (12.5 Liters/Min) 35 PSI Supplied with 1 x 1/2" male thread fitting, 1 x 1/2" straight barb fitting, and 1 x 1/2" 90 barb fitting and high flow filter, Self priming, Smooth, silent operation Can run dry without damage, Thermal overload and ignition protection