The Lawn Genie Anti-Siphon Valve is a 3/4 inch valve designed to prevent backflow and siphoning of water in irrigation systems. It has a maximum pressure rating of 150 psi and is manufactured by TORO IRRIGATION under the Lawn Genie brand. The valve is compact, measuring 4.4 inches in length, 6.4 inches in width, and 5.8 inches in height. It weighs 0.7 pounds and comes with a Prop65 warning for cancer and reproductive harm.