The Flow-Thru Water Level Master™ is a float valve system that regulates the flow of water to a low volume proportioner (not included). When the solution in the Level Master Tank (sold separately) drops below a pre-set level, the primary float valve opens to allow water to flow through to the proportioner. The proportioner dilutes concentrated chemical and dispenses the diluted solution into the Level Master Tank. This diluted solution can then be drawn into a second proportioner which dilutes it further and dispenses an ultra-lean solution. The system cycles continuously and a secondary fail-safe float prevents overfilling.