EcoPower toilet flushometer valve only, top spud - exposed model, 1.28 Gpf. Neutral rough-in. Chrome Plated Finish, Neutral Rough. Utilizing the same proven technology as our 1.6 GPF EcoPower flush valves, our new 1.28 GPF EcoPower High Efficiency Toilet (HET) flushometer valves save 20% more water than standard 1.6 GPF valves and an impressive 63% water savings over traditional 3.5 GPF flush valves; and TOTO 0.5 GPF EcoPower High Efficiency Urinal (HEU) flushometer valves provide a 50% water savings over 1.0 GPF urinal flush valves, allowing facilities to save thousands of dollars—and conserve thousands of gallons of water — every year. TOTO HET and HEU flushometer valves can help earn one LEED credit and help you satisfy the growing demand for high efficiency, water-conserving plumbing fixtures in the commercial sector. Our HET and HEU flushometer valves feature the EcoPower hydro-powered, self-generating power system; a superior piston valve that resists warping; a neutral rough-in; and an automatic flushing system that provides a “courtesy flush” every 24 hours. In addition, our 1.28 GPF EcoPower HET valves are also available for use with both standard vacuum breakers and 24” vacuum breakers and feature a manual flushing button.