Quickly and automatically fills and maintains water levels in troughs and stock tanks. Delivers a low flow of up to 240 gals per hour. Easy set-up has 3 options: mount above or below water level from the side, bottom or top of the tank. Features a built-in check valve, keeping water ready for animals' needs, and a switch to lock valve in "off" position. Fully adjustable float angle. Easy to maintain, just unscrew valve body to stop water flow and access filter. Constructed of durable, non-corrosive material. 2 year warranty.