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Kohler Highline Two-Piece Toilet vs Highline Arc Two-Piece Elongated Toilet

Both are Kohler Highline two-piece elongated toilets with Comfort Height seating, a 12-inch rough-in and a 1.28 gpf Class Five canister flush, so flushing and comfort are effectively the same. The K-76301 Highline stands out for its concealed trapway and Clean Caps bolt caps, which make the base easier to wipe down and give a cleaner look. The Highline Arc is the simpler buy for a full replacement because it ships with a slow-close seat, wax ring and hardware. Pick the K-76301 for easier cleaning and a sleeker skirted look; pick the Arc if you want a complete kit with a seat included.

  • Choose the K-76301 Highline if you want the concealed trapway and low-profile bolt caps that make the base easier to clean.
  • Choose the Highline Arc if you want a complete kit with a slow-close seat, wax ring and hardware in the box.

Prices

  • Kohler Highline Two-Piece Toilet: $474.82 at Baths of America (last seen Nov 10)
  • Highline Arc Two-Piece Elongated Toilet: $53.11 at Ma boutique (last seen Nov 10)
  • Difference: the Highline Arc Two-Piece Elongated Toilet is $421.71 cheaper than the Kohler Highline Two-Piece Toilet at the latest prices (Nov 10)
Kohler
KOHLER K-76301 Highline Two-piece elongated toilet with concealed trapway, 1.28 gpf

Kohler Highline Two-Piece Toilet

KOHLER K-76301 Highline Two-piece elongated toilet with concealed trapway, 1.28 gpf

$474.82at Baths of AmericaChecked 12 h ago
See all prices and details
Visit Baths of America
Pros
  • Concealed trapway hides the bend and simplifies cleaning
  • Clean Caps low-profile bolt caps look neat and wipe clean
  • Comfort Height rim eases sitting and standing
  • Proven Class Five canister flush at 1.28 gpf
  • Fully glazed 2-1/8-inch passageway
Cons
  • Seat sold separately
  • No wax ring or hardware in the box
  • Skirted base can complicate some repairs
H
Highline Arc Two-Piece Elongated Toilet – 1.28 GPF Single-Flush System in White (Includes Seat)

Highline Arc Two-Piece Elongated Toilet

Highline Arc Two-Piece Elongated Toilet – 1.28 GPF Single-Flush System in White (Includes Seat)

$53.11at Ma boutiqueChecked 19 h ago
See all prices and details
Visit Ma boutique
Pros
  • Ships with a slow-close seat, wax ring and hardware
  • Same reliable 1.28 gpf Class Five flush
  • Comfort Height elongated bowl
  • Three-bolt quick-connect installation
  • WaterSense certified
Cons
  • Exposed trapway is harder to clean behind
  • Standard bolt caps are less tidy than Clean Caps
  • Included seat is basic plastic

What separates them

Kohler Highline Two-Piece ToiletHighline Arc Two-Piece Elongated Toilet
TrapwayConcealed trapway with a smooth skirted baseStandard exposed trapway
Bolt capsClean Caps low-profile capsStandard bolt caps
Seat includedSeat not includedSlow-close elongated plastic seat included
Install kitBowl and tank onlyWax ring and hardware included
Flush system1.28 gpf Class Five canister, single gravity flush1.28 gpf Class Five canister, single gravity flush
Bowl and heightElongated bowl, Comfort Height, 16-1/2-inch rimElongated bowl, Comfort Height
Rough-in12 inches12 inches
Reported weightAbout 93 lbAbout 102 lb

Price history

  • Kohler Highline Two-Piece Toilet: lowest $494.81 on Nov 10 at Amazon.
  • Highline Arc Two-Piece Elongated Toilet: lowest $153.93 on Nov 10 at Trumans Fabric and Foam.

Prices at every store

Kohler Highline Two-Piece Toilet

  • Easy PlumbingNew

    In stockReturn policy

    $474.82Checked 12 h ago
    Visit Easy Plumbing
  • ShopGPSNew

    In stockReturn policy

    $474.82Checked 12 h ago
    Visit ShopGPS
  • KOHLER Stores by General Plumbing SupplyNew

    In stockReturn policy

    $474.82Checked 12 h ago
    Visit KOHLER Stores by General Plumbing Supply
  • Baths of AmericaNew

    Availability unknownReturn policy

    $474.82Checked 12 h ago
    Visit Baths of America

Also available at

  • Easy PlumbingCheck price at Easy Plumbing
  • Shop Kohler NJCheck price at Shop Kohler NJ
All 9 stores and price history →

Highline Arc Two-Piece Elongated Toilet

  • Ma boutiqueNew

    In stockReturn policy

    $53.11Checked 19 h ago
    Visit Ma boutique
  • The Home DepotNew

    In stock

    $189.00Checked 20 h ago
    Visit The Home Depot
  • Trumans Fabric and FoamNew

    Availability unknown

    $153.93Checked 19 h ago
    Visit Trumans Fabric and Foam
  • Core RangerNew

    Availability unknown

    $229.00Checked 19 h ago
    Visit Core Ranger
All 6 stores and price history →

Specs compared

SpecKohler Highline Two-Piece ToiletHighline Arc Two-Piece Elongated Toilet
Rough In12"Standard 12" (305 mm)
Bowl ShapeElongatedElongated bowl
TypeTwo PieceToilet
InstallationFree StandingThree-bolt quick-connect installation
Flush Volume1.28 gal. per flush1.28 GPF
Overall Height31-1/4"—
Overall Width18"—
Overall Depth29-3/4"—
Bowl Height16-1/2"—
Water Surface Area10-5/8" x 8"—
Water Depth5-3/8"—
Passageway Diameter2-1/8"—
Show all 40 specsShow fewer specs
SpecKohler Highline Two-Piece ToiletHighline Arc Two-Piece Elongated Toilet
Flow Rate1.28 gallons-per-flush—
ConfigurationTwo Piece—
MaterialVitreous China—
High EfficiencyYes—
Flush rate—1.28 gpf (4.8 lpf)
Seat height—Comfort Height®
Trip lever—Left-hand Polished Chrome
Flush technology—Class Five® canister
Flush type—Single-flush gravity
Included items

What reviewers say

Kohler Highline Two-Piece Toilet

Owners of the Highline line generally report strong, reliable flushing and like the taller seat and hidden trapway. Complaints tend to center on the two-piece assembly and the seat, which is sold separately on many versions.

What people mention
  • Flush powerPraisedOwners say the 1.28 gpf Class Five flush clears waste in a single flush.
  • Seat heightPraisedThe chair-height bowl is called easier to sit down on and stand up from.
  • CleaningPraisedThe concealed trapway and smooth sides are described as quick to wipe down.
  • Two-piece seamMixedSome owners find the joint between tank and bowl collects dust and needs attention.

Highline Arc Two-Piece Elongated Toilet

Owner feedback on this Highline line is generally positive, with the tall Comfort Height bowl and the reliable Class Five flush drawing the most praise. Complaints tend to focus on the plastic seat and occasional fill or flush adjustments after installation.

What people mention
  • Comfort HeightPraisedOwners say the taller bowl is easier on knees and backs than a standard-height toilet.
  • Flush reliabilityPraisedThe Class Five canister flush is described as clearing waste well with few clogs.
  • Seat qualityCriticisedThe included plastic slow-close seat is called basic and less solid than wood seats.
  • InstallationMixedThe three-bolt setup is quick, but some owners report needing to adjust the fill valve or tank seal.

Questions and answers

Which is better for easy cleaning?
The K-76301 Highline. Its concealed trapway and Clean Caps bolt caps leave a smooth base with fewer crevices to wipe around. The Arc has a standard exposed trapway.
Do both flush the same?
Yes. Both use Kohler's Class Five canister and a 1.28 gpf single gravity flush, so flush power and water use are effectively identical.
Which one is a complete replacement?
The Highline Arc. It includes a slow-close seat, wax ring and hardware. The K-76301 comes as bowl and tank, so you buy the seat and install kit separately.
Is the K-76301 worth stepping up to?
If a clean, skirted look and easier cleaning matter to you, yes. If you just want a full kit with a seat, the Arc covers the basics.
Do both fit a 12-inch rough-in?
Yes. Both are standard 12-inch rough-in toilets with elongated Comfort Height bowls.
Which lasts longer?
Both are vitreous china with the same canister flush, so service life should be similar. The Arc's included plastic seat is the part most likely to wear first.

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More comparisons

  • KOHLER K-76301 Highline Two-piece elongated toilet with concealed trapway, 1.28 gpf vs KOHLER Highline Arc Extra-Tall 2-Piece Elongated Toilet Model 78305-0

Buying guides that pick them

  • Best two-piece toilets with arc bowl
—
bowl, tank, seat, wax ring, and hardware
Dual Flush—No
Macerating Flush—No
Pressure Assisted Flush—No
Flush Features—WaterSense certified
Included Accessories—Everything necessary for installation
Supported Accessories—7/8” Flexible Supply Hose
Size Dimensions—15.47 in (width)
Size Weight—102.10 lb
Rough-In Size—12 inch
Installation Type—3-bolt installation
Included Components—Everything necessary for installation
Bowl Material—Vitreous China
Seat Size—Elongated
Seat Type—Elongated, Slow-close
Seat Features—Slow-close
Seat Material—Plastic
Color—White
Height—Comfort height