This fully automatic drinker operates on any pressure system. These dependable drinkers hook up to any standard 1/2 in. pipe to provide a limitless supply of clean water. Safely operates between 10-70 PSI. The standard is 2 1/2 in. deep and is 6 1/2 in. x 6 1/2 in. x 5 in. high. The large is 8 1/2 in. x 8 1/2 in. x 5 in. high. The bowl is 2 3/4 in. deep. The small is suggested for up to 175 birds and the large is suggested for up to 250 birds. Little Giant Automatic Waterer, Small/Large Guard
