CDS-John Blue 12-Volt Agri-Pumps are built with corrosion resistant materials suitable for fertilizers and most chemicals. The AP1816W produces up to 4.8 gpm or 45 psi. They are also the only 12-Volt pump on the market that is weatherproof tested and completely protected from weather, dust and overspray. The combination of materials, weatherproof protection and low current draw make these pumps a can't miss option for electric pumps.