The DMS2 Distribution Metering Station is designed to deliver the most consistent dilution ratio in the industry. This unit uses stainless steel DEMA injectors to mix water and chemical at a constant rate. PECO recommends using a PE020 pumping station to deliver water at a constant volume and pressure. The PE020 will insure constant solution ratio delivered to the tunnel device. The DEMA injectors are downstream of the solenoids to insure pump and control devices are less susceptible to chemical attack. The combination of the PE020 and the DMS2 insures a constant pressure and volume of water at the nozzle, which is vital to the touch-less car wash process.