The MLS-3401 EasyFill System is a revolutionary filling solution for ponds, watering troughs or fountains. No other filling system is like it. With no moving parts, it will provide years of reliable, practical filling without the problems of other systems. All at a fraction of the cost of professional systems. The system is simple to install and provides everything needed to begin automatically filling with confidence and includes: MC-01 Sensing Unit 3/4" 15gpm 24VAC valve w/MPT 24VAC Class 2 power unit Installation accessory kit User manual (plumbing supplies not included) Say good-bye to sticky unreliable float valves and begin enjoying your pond or watergarden again! Backed by a 3 year warranty, the EasyFill will be the last auto-fill you will ever need.