(2) Float Ball Valve 1/2 Inch Supply Tube Male Automatic Fill Feed Tank Pool Spa Package includes: 2 packs tank float valves, spend less time filling and checking the water tank to protect the plants from drying No power or pump required: the water float ball valve is suitable for low pressure gravity feeding systems, leak-free operation is achieved by hand tightening Material: the mini float valve is durable with adjustable arms, made of hard ABS, will not corrode or rust Size: the floating valve has a 1/2 NPT pipe thread; This is very common in the pipeline world, the thread size is approx. 3/4 inch with standard gaskets to eliminate leakage Applicable environment: the water trough float valve is suitable for ponds, chickens, livestock sinks, aquariums, Aquaponics, aquaculture, hydroponic tank reservoirs Product Description Made of hard ABS, will not corrode or rust. With standard gaskets to eliminate leakage. No power or pump required, suitable for low pressure gravity feeding systems.