Poultry Fountain automatically refills as needed so fresh water is available all the time. Large Fountain will water up to 250 adult birds and has a capacity of 1.5 quarts. 8″ in diameter and 2.75″ deep. Reliable brass valve will work on pressure or gravity systems. Tough red plastic bowl will not rust and cannot be harmed by medication. Attaches to standard 1/2″ pipe.