Shurflo 2088-443-144 12VDC 3.5GPM, 45 PSI [2088-443-144-L008] [PENTAIR / SHURFLO] $166.00

This diaphragm 12V pump delivers reliable performance in high flow, moderate pressure applications. It's used in a variety of spraying, and transferring applications that require flows of up to 13.2 l/min (3.5 GPM). It's available in a variety of chemical resistant materials, can be mounted in any position, and is designed for easy maintenance. 1/2" MSPT ports

Datasheet