The Rheem Leak Guard Auto Water Heater Shut-Off Valve AP19457 is a brand new product designed to automatically shut off the water heater in case of a leak, protecting your home from potential water damage. This valve is compatible with Rheem water heaters and has a 3/4 inch water connection size. Made of plastic and metal materials, it is suitable for indoor installation and operates on a corded electric power source. With features like automatic shut-off and leak detection, this valve provides peace of mind for residential use. Additionally, it comes with a 1-year manufacturer warranty and is designed for easy pipe mounting.