Wall-mounted unit dispenses up to four chemical products--four high flow four low flow. Diluted product will dispense at rate of 2.5 GPM. Dispenser system is closed loop reducing human exposure to chemicals. Easy to install--no tubes or metering tips to install. Water supply must be available to use dispenser. Designed for use with Zep® Professional Advantage+ chemicals. Dispenser Type: For Liquids; Capacity (Volume): 8 Liters; Holds: 4 2-Liter Chemical Products; Color(s): Blue.