Only competition is the Levolor. Auto-fill, which uses probes to sense the water level through conductivity. It requires an elaborate, electronic circuit board to accomplish this. Because of the many electrical component parts, there are many things that can go wrong with it and does. The AquaFill only has one moving part and that is a small polystyrene float bobber that rides up and down on a hermetically sealed shaft containing a micro leaf switch.
The float acts as a switch between the 24 volt transformer and the inline solenoid switch. When the float bobber drops due to a loss of water through splashing and evaporation, two magnets embedded into the float, causes the micro switch to close and completes the circuit, sending voltage to the solenoid causing it to open putting water into the pond. This would cause undue wear and tear on both the switch and the solenoid. The item "Electronic Float Level Controller for Pool, Fountain, Pond, Spa, Hot Tub NEW" is in sale since Saturday, July 16, 2016.
This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Water Levelers". The seller is "aquamediacorp" and is located in Escondido, California. This item can be shipped to United States.