... , UP-Down, Protection 3.12VDC,24VDC,220VAC,380VAC,etc water level controller/water level switch1. Capacity: 10A 2. Up, Down, UP-Down ... circuit, combined with the upgradeof water level classification through upper and lower pools of water towerof high-rise buildings. ... It can effectively prevent pool drainage, water overflow by automatically water supplement or decrease, absolutely prevent the pump ...