Jabsco Single Stack Water System - 4.8 GPM - 40PSI - 12VExperience reliable water pressure on board with the Jabsco Single Stack Water System a fully assembled, plug and play solution designed for boats and RVs that demand four or more outlets. Delivering 4. 8 GPM at 40 PSI from a compact 12V package, it provides steady flow from galley taps to showerheads. All in one water pressure package: The Single Stack combines a PAR Max 4. 0 pump, a strainer, and a pre pressurized accumulator tank into a single,