Shurflo Pump 2088-474-144 24vDC 45PSI Demand Switch 3.4 GPM, 2.71 amps, max 40 psi. Diaphragm pump that can deliver up to 3.0 gpm open flow from a DC battery pack.(Self priming to 12 feet vertical head). These pumps are ideal for cabin, watering projects, or small home system. Feature 45psi demand switch. Toboa Energy Resources stocks over 150 different Shurflo pumps and replacement part kits. Since 2007 we have been providing safe and secure internet sales, you benefit from low cost door to door delivery service from a company that stands behind its products and stands up for its customers.