Flojet Water Booster System - 40PSI - 4.5GPM - 24V [02840300A]Water Booster System 40PSI 4. 5GPM 24V The Flojet 2840 Series Booster Systems are designed to provide constant water pressure of 0 to 40 psi (0. 7 to 2. 7 bar) and a maximum flow rate of 4. 5 GPM at 10 psi (0. 7 bar). The pump is fully automatic, with a built in inlet strainer, pressure switch, and check valve, and supplies smooth flow from trickle to full flow. Typical uses include applications where available water pressure is very low and