The Gerber Ultra Flush 21-318 is part of the Toilet
test program at Consumer Reports. In our lab tests, Toilet
models like the Ultra Flush 21-318 are rated on multiple criteria, such as those listed below.
Solid waste removal: The ability to move simulated waste through the bowl and trap.
Noise: Flush quietness without the seat.
Bowl cleaning: How well flushing cleaned the bowl's front and sides.