Jabsco Par-Max HD4 Heavy Duty Water Pressure Pump - 24V - 4 GPM - 40 PSI [Q402J-115S-3A]Par Max HD4 Heavy Duty Water Pressure Pump 24V 4 GPM 40 PSI HD (Heavy Duty) models include a wider diameter motor with a powder coated shell, cast aluminum endbells and lower housing to improve pressure capability and life. Available in configurations up to 6 GPM (23 LPM) and 60 PSI (4. 1 BAR), these pumps deliver exceptional performance. Standard models provide good performance in an economical footprint. These configurations are available in 1 3