This Levolor 110/220V dual fill water level controller that maintains water levels in two bodies of water, such as a pool/spa with two separate sets of equipment. Can be used in any situation where a consistent water level is desired and acted upon. Ideal for pool and spa dual equipment systems. Controls are wired 220V from factory, field adjustable for 110V installations. Includes two 100-feet sensor and two 1-inch valve.