The EPA's WaterSense program announced the first final product specification, which covers high-efficiency toilets (HETs) - those that use 1.28 gallons per flush (gpf) or less. With the announcement of the final HET specification, manufacturers and retailers and distributors that produce or sell these water-efficient plumbing fixtures are welcome to join the program. Once manufacturers have a signed partnership agreement in place, they may begin the third-party certification process to obtain permission to use the WaterSense label. Only HETs meeting EPA’s performance and efficiency requirements will be allowed to bear the WaterSense label.