Final answer:
The requirements for WEp Indoor Water Use Reduction are based on the WaterSense program and include the use of high-efficiency toilets, water-efficient faucets, showerheads, and irrigation equipment.
Step-by-step explanation:
The requirements for WEp Indoor Water Use Reduction are based on the WaterSense program developed by the EPA. The program encourages water efficiency in the United States through the use of a special label on consumer products. Some of the requirements for indoor water use reduction include the use of high-efficiency toilets (HETs), bathroom sink faucets, and accessories with water-efficient features, as well as the use of water-efficient showerheads and irrigation equipment.