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The Kohler Highline K-3658 is part of the Toilet
test program at Consumer Reports. In our lab tests, Toilet
models like the Highline K-3658 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.
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