Hydro Foamer hose end proportioners combine automatic dilution with convenient control of where and how solution is applied. These foamers provide a thick, rich foam for more "cling" time on the surface being cleaned. The Hydro Foamer's unique injection concept mixes the proper amount of concentrate with both air and water to produce a thick, rich foam for a longer soak. Approximate dilution rates are: Max. 128:1. Min. 12:1 On and off functions are controlled using a trigger on the spray gun. To rinse, the concentrate container is disconnected via a quick coupler.