The five chamber Aqua Jet Water Pressure Pump "WPS" series provides a reliable heart for small boat and recreational vehicle water pressure systems. Efficient and compact, Aqua Jet pumps are particularly suitable where low amperage and sound levels in relation to water flow are placed at a premium - such as in shower and galley applications.• Type: Self-Priming• Pump Operation: 12 Volt DC• Flow Rate: 3.5 Gallon Per Minute• Pressure Rating (PSI): 41 Pound Per Square Inch• Length (IN): 9.31 Inch• Width (IN): 8-1/4 Inch• Height (IN): 4-1/2 Inch• Material: EPDM Valve/ Polypropylene Valve Housing• With Pressure Switch: Yes• Operates In Fresh Or Sea Water• Easy, Low Cost Maintenance Self-Priming Pressure Switch Standard Long Service Life | Johnson Pump Fresh Water Pump, 12 Volt; Self-Priming; 3.5 Gallon Per Min