Summary
Dual flush toilets provide two options for users to dispose of liquid or solid wastes. Dual flush toilets certified under the Environmental Protection Agency’s (EPA) WaterSense program must use no more than an average equivalent flush volume of 1.28 gallons, which is typically achieved through a liquid waste flush of 0.8 gallons of water and a solid waste flush of 1.6 gallons of water. WaterSense certified dual flush toilets must also meet waste removal performance requirements to ensure performance is not compromised with the lower flush volumes.
