Delivers final solution with adjustable concentration. The proportional pump maintains a constant concentration in variable water flow. Compact design, easy to operate. Adjustable and accurate concentration levels. Delivers concentration levels between 50 – 1200 ppm. Unaffected by changes in water pressure flow. No electricity or wiring required. On-demand dispensing eliminates chemical waste. Easy to install, only one water connection required and 20 in x 30 in of wall space. High Activation model available.