Behlen Country EF-2C 2-Hole Energy-Free Waterer It is recommended that each unit be installed with the poly earth tube to ensure proper operation in cold weather New, non-siphoning bl water valve, which features: fast, consistent fill; units have a non-siphoning, easy maintenance water valve; use with pressure lines from 0-55 p.s.i.; additional pressure regulator required for pressures above 55 p.s.i. Removable drain plugs and accessible covers and built-in hold downs 36-Inch by 21-Inch by 23-Inch 5-year limited warranty on the body and a 1-year limited warranty on valves and controls