The IceCap ATO EZ Automatic Top-off System replaces evaporated water using three optical sensors instead of a mechanical float switch — no moving parts to stick or get fouled by salt creep. A compact DC pump refills the tank automatically whenever the water level drops. Sensors: 3 optical sensors monitoring Low, Normal, and High water levels, with built-in overflow fail-safes Pump: brushless DC refill pump, 50 GPH flow rate, ~6ft max head height, 5 watts Mount: magnetic, fits tanks/sumps up to 1/2in thick Includes: optical sensor, DC pump, power supply, 6.5ft tubing, universal holder, siphon breaker Optical sensors are the real advantage over a float-switch ATO — there's no float arm to physically stick in the up or down position, which is the single most common failure mode that leads to either a dry-running pump or an overflow.Compatible replacement parts: optical sensors and refill pumps for the ATO EZ.
