Check the listing for details. 3 Pack Float Valve for Automatic Waterer Bowl Horse Cattle Goat Sheep Pig Dog. Condition: New. Listed at 21.99 USD. This listing is for 3 high quality fully adjustable automatic float switch. Includes thick poly/rubber washer and nut for attaching to your watering device. Works great for converting ANY watering system into a low pressure watering system. Float fully adjusts to any angle. This unit will keep your water reservoir filled at all times and automatically shut off when full. Simply drill a 7/8" hole in a water bucket, pail, trough, barrel, tank, tube, or pipe and attach. Convert just about anything into an auto fill low pressure waterer. Float has a 1/2" MIP Threads and is 9.25 inches long when straight with a 2 inch wide float. Will not ever rust or corrode and is constructed with food grade plastics to last a lifetime.Operates best between 20-50 psiThis will not work with gravity fed watering. These require water pressure to work properly.