Replacing the CDS-John Blue DP-392 Diaphragm Pump (item number DP-392) is the CDS-John Blue DP-407.1 Diaphragm Pump. Employ it inside your sprayer systems requiring medium to high pressure. Rated with a maximum pressure of 725 PSI and a flow rate of 40.7 GPM, the DP-407.1 is a stellar component in your assemblies that deploy liquids in agricultural, commercial and industrial settings.