To rinse, the concentrate container is disconnected using an easy-to-operate quick coupler, deigned to allow either a full width spray or powerful jet stream while rinsing. This range of control helps personnel apply the solution where it's wanted. A wide range of dilutions can be achieved from lean to rich. The HydroFoamer's unique injection concept mixes the proper amount of concentrate with both air and water to produce a thick, rich foam for longer soak time.