
KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf
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The Kohler Wellworth K-3998 is a two-piece elongated toilet with a 1.28 gpf high-efficiency flush, WaterSense certified. Its Class Five canister flush valve uses gravity and a cascading water release to clear the bowl with less water than older 3.5 gpf models. The elongated bowl and 2-1/8-inch fully glazed trapway make it a practical pick for a primary or guest bathroom. Against one-piece and comfort-height rivals it is a straightforward, widely serviced design rather than a feature-heavy one.
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Owners of the Wellworth line generally report reliable flushing and easy installation, and many cite the water savings. Some note the standard height and the two-piece seams as drawbacks.
The KOHLER K-3998 Wellworth is a two-piece elongated toilet with a 1.28 gpf (4.8 lpf) flush. Its 1.28-gallon flush setting saves up to 16,500 gallons of water per year compared to an old 3.5-gallon toilet. The elongated bowl gives added room and comfort.
It uses KOHLER's Class Five canister flush valve, which uses gravity and a cascade of water to increase the power and effectiveness of the flush. The trapway is 2-1/8" (54 mm) and fully glazed. The trip lever is left-hand and Polished Chrome. The toilet is floor-mounted, made of vitreous china, and suitable for residential use.
The combination consists of the K-4467 tank and the K-4198 bowl. It coordinates with other products in the Wellworth collection. It is WaterSense certified and may be eligible for consumer rebates in some municipalities.




