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Kohler
KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf

KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf

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$326.40at Easy PlumbingChecked Nov 10

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Price facts

  • Last seen at $326.40 at Easy Plumbing on Nov 10.

Our take on the KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf

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.

Best forReplacing an older high-flow toiletPrimary or guest bathroomsHouseholds wanting a WaterSense-certified flushBuyers who prefer a familiar, widely serviced design
Pros
  • 1.28 gpf flush cuts water use versus older 3.5 gpf toilets
  • Elongated bowl adds seating room and comfort
  • Class Five canister valve delivers a strong gravity flush
  • Fully glazed 2-1/8-inch trapway resists clogging
  • WaterSense certified and rebate-eligible in some areas
  • Vitreous china build with a limited Kohler warranty
Cons
  • Two-piece design means more assembly and cleaning seams than one-piece
  • Standard height, not comfort height
  • Left-hand trip lever only
  • At 86.3 lb it is heavy to move and set alone
  • No slow-close seat included

KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf prices at every store

  • Easy PlumbingNew

    In stockReturn policy

    $326.40Checked Nov 10
    Visit Easy Plumbing

What reviewers say

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.

What people mention
  • Flush performancePraisedOwners say the canister flush clears waste in one go and rarely clogs.
  • Water usePraisedBuyers like the 1.28 gpf flush and the lower water bills that come with it.
  • InstallationPraisedReviewers describe setup as manageable for a confident DIYer.
  • HeightMixedSome find the standard height low, especially taller users and older adults.
  • CleaningMixedThe two-piece seam and tank joints collect dirt more than one-piece designs.
  • SeatCriticisedBuyers note the seat is not included and must be bought separately.

About the KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf

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.

Design
Two-piece, elongated bowl
Flush volume
1.28 gpf (4.8 lpf)
Trapway
2-1/8" (54 mm), fully glazed
Flush valve
Class Five canister
Trip lever
Left-hand, Polished Chrome
Material
Vitreous china
Installation
Floor-mount
Dimensions
30" L x 18" W x 29-1/4" H
Weight
86.3 lb
Components
K-4467 tank and K-4198 bowl
Certification
WaterSense certified
Use
Residential
Warranty

Questions and answers

Does the Kohler Wellworth K-3998 come with a seat?
No. The box contains the tank and bowl only. You need to buy a separate elongated seat.
Is it a comfort-height toilet?
No. It is a standard-height floor-mount toilet at about 29-1/4 inches overall height. Comfort-height models sit taller.
How much water does it use per flush?
1.28 gallons per flush, or 4.8 liters. That meets WaterSense criteria and is well below older 3.5 gpf toilets.
What are the rough-in and bowl dimensions?
The assembled toilet measures 30 inches long, 18 inches wide and 29-1/4 inches high, with an elongated bowl. Check your rough-in measurement before ordering.
Is it hard to install?
It is a standard floor-mount two-piece install. The tank and bowl come as separate pieces and the unit weighs about 86 lb, so plan for two people to lift it.
Can I get a rebate for it?
It is WaterSense certified, so it may qualify for municipal rebates. Check your local water utility's program.
Where is the KOHLER K-3998 Wellworth Two-piece elongated toilet, 1.28 gpf cheapest?
At Easy Plumbing, for $326.40, as of our latest check.

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