4 Proportioning Cartridge Filter The optional head filter, enhances filtration where needed in troublesome water conditions reducing service calls. The filtration is independent of the number of units in line. Tamper proof housing and activating mechanism Magnetic solenoid type activating valve The large membrane activation ensures perfect operation, up to 9 bar pressure and 70° C 4 products selector The 4 product ProMax is equipped with a new selector with O-ring of specially formulated elastomers. It offers the highest resistance to the widest range of chemicals. FLEX GAP VERSION The FLEX GAP is equipped with a patented backflow preventer device, minimizing restriction and ensuring maximum performance. <  Fast connections <  Three colors for three different flow rates: - Grey Low - Yellow Medium - Blue High <  Same size discharge hose for all models <  The venturi is self- activating, no flow restrictors needed <  Single product units can be easily converted to a 4 product model in the field <  Maximum strength <  Ease of maintenance <  Fully interchangeable parts <  Excellent performance <  Tool free maintenance Also available the AIR GAP VERSION <  Two colors for two flow rates - Grey Low - Yellow Medium Venturi The entire system can be easily disassembled and reassembled. Installation times are minimized. No screws to remove. No need to open the dispenser to install Robust and durable PP enclosure Auto-locking connection External tip seat The product suction fittings are located outside, where the tips are also inserted. <   Accurate dilution rates <   Select from a full range of supplied metering tips Features