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KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf
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KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf

KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf

With its clean, simple design and efficient performance, this Highline water-conserving toilet combines both style and function. An innovative 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year, compared to an old 3.5-gallon toilet, without sacrificing flushing power. This model features a unique tank liner that minimizes exterior condensation in humid environments.


  • Two-piece design
  • Elongated bowl offers added room and comfort
  • Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults
  • Left-hand Polished Chrome trip lever
  • Insuliner tank liner minimizes condensation on the tank
  • Combination consists of the K-4467-U tank and the K-4199 bowl
  • Eligible for consumer rebates in some municipalities
  • 1.28 gpf (4.8 lpf)
  • 2-1/8" (54 mm) fully glazed trapway
  • Class Five canister optimizes the flow out of the tank, harnessing gravity and the natural powerful reducing cascade of water to increase the power and effectiveness of the flush

Additional Resources

Specification Sheet
Installation Guide
Parts Breakdown

Recommended Products/Accessories

KOHLER 1023457 Toilet Wax Ring And Hardware Kit
KOHLER 1265114 12" Toilet Supply Line
KOHLER K-23726 Drain treatment
KOHLER K-9379 Trip lever
KOHLER K-5420 Low-profile toilet bolt caps
KOHLER K-4639-RL ReadyLatch® Quiet-Close™ round-front toilet seat
KOHLER K-4636-RL ReadyLatch® Quiet-Close™ elongated toilet seat

$170.06

Original: $485.89

-65%
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf

$485.89

$170.06

More Images

KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 2
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 3
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 4
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 5
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 6
KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf - Image 7

KOHLER K-3999-U Highline Two-piece elongated toilet, 1.28 gpf

With its clean, simple design and efficient performance, this Highline water-conserving toilet combines both style and function. An innovative 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year, compared to an old 3.5-gallon toilet, without sacrificing flushing power. This model features a unique tank liner that minimizes exterior condensation in humid environments.


  • Two-piece design
  • Elongated bowl offers added room and comfort
  • Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults
  • Left-hand Polished Chrome trip lever
  • Insuliner tank liner minimizes condensation on the tank
  • Combination consists of the K-4467-U tank and the K-4199 bowl
  • Eligible for consumer rebates in some municipalities
  • 1.28 gpf (4.8 lpf)
  • 2-1/8" (54 mm) fully glazed trapway
  • Class Five canister optimizes the flow out of the tank, harnessing gravity and the natural powerful reducing cascade of water to increase the power and effectiveness of the flush

Additional Resources

Specification Sheet
Installation Guide
Parts Breakdown

Recommended Products/Accessories

KOHLER 1023457 Toilet Wax Ring And Hardware Kit
KOHLER 1265114 12" Toilet Supply Line
KOHLER K-23726 Drain treatment
KOHLER K-9379 Trip lever
KOHLER K-5420 Low-profile toilet bolt caps
KOHLER K-4639-RL ReadyLatch® Quiet-Close™ round-front toilet seat
KOHLER K-4636-RL ReadyLatch® Quiet-Close™ elongated toilet seat

Product Information

Shipping & Returns

Description

With its clean, simple design and efficient performance, this Highline water-conserving toilet combines both style and function. An innovative 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year, compared to an old 3.5-gallon toilet, without sacrificing flushing power. This model features a unique tank liner that minimizes exterior condensation in humid environments.


  • Two-piece design
  • Elongated bowl offers added room and comfort
  • Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults
  • Left-hand Polished Chrome trip lever
  • Insuliner tank liner minimizes condensation on the tank
  • Combination consists of the K-4467-U tank and the K-4199 bowl
  • Eligible for consumer rebates in some municipalities
  • 1.28 gpf (4.8 lpf)
  • 2-1/8" (54 mm) fully glazed trapway
  • Class Five canister optimizes the flow out of the tank, harnessing gravity and the natural powerful reducing cascade of water to increase the power and effectiveness of the flush

Additional Resources

Specification Sheet
Installation Guide
Parts Breakdown

Recommended Products/Accessories

KOHLER 1023457 Toilet Wax Ring And Hardware Kit
KOHLER 1265114 12" Toilet Supply Line
KOHLER K-23726 Drain treatment
KOHLER K-9379 Trip lever
KOHLER K-5420 Low-profile toilet bolt caps
KOHLER K-4639-RL ReadyLatch® Quiet-Close™ round-front toilet seat
KOHLER K-4636-RL ReadyLatch® Quiet-Close™ elongated toilet seat