Zodiac K1100A Levolor 110/220V Fill Only Water Level Controller with 50-Feet Sensor Levolor 110/220V fill only water level controller Can be used in any situation where a consistent water level is desired and ideal for new or existing pool and spa systems Electronic fill device that detects low water conditions and automatically replaces water to a pre-set level Easily installed on new or existing pool and spa equipment systems with no modifications needed to the pool surface or structure Available in 110/220 volt models and includes 50-feet sensor without valve