JaecoPAK metering pumps from JAECO Fluid Systems are most commonly used for chemical metering and desalinization in multiple applications. They are available in both simplex and duplex configurations with pump capacities ranging from 0.38 to 150 gph at operating pressures up to 2,000 psi with an accuracy of plus or minus 0.5 percent. They are cast iron with a choice of 316 stainless steel or alloy 20 liquid ends with single ball or poppet check valves. Choose between neoprene, Viton or Teflon packing options and a single- or three-phase 12- or 24-volt electric motor, gas-powered engine or belt-driven option. They are completely serviceable. 877-778-3456; www.jaecofs.com.