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Highline Arc The Complete Solution 2-piece 1.28 GPF Single Flush Elongated Toilet in White (Slow-Close Seat Included)

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  • Easy to install with included slow-close toilet seat ($30 value)
  • Class 5 Flush exposes 90% less seal material (see video)
  • Comfort Height offers chair-height seating (about 2 in. taller)
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Top Rated

Product Overview

Trusted for years by professionals, Highline toilets are KOHLER's bestselling toilet family. A brilliant blend of style and water efficiency, this Highline Arc toilet is distinguished by an elegant flared tank. Coupled with KOHLER's powerful canister flush valve, there's no sacrificing performance for design. An innovative 1.28 Gal. flush setting provides significant water savings of up to 16,500 Gal. per year, compared to an old 3.5 Gal. toilet. This Complete Solution package includes everything necessary for installation and is available exclusively at The Home Depot.
  • 2-piece toilet
  • 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
  • 1.28 Gal. Per Flush (GPF)
  • Standard left-hand polished chrome trip lever included
  • Complete solution toilets provide everything you need in 1 box, including bowl, tank, slow-close toilet seat, cover, wax ring and floor hardware
  • Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl and trap way to create a strong siphon during flushing
  • Class 5 flushing technology offers virtually plug-free performance and rinsing power for a clean bowl
  • Standard 12 in. rough-in
  • 3-bolt installation
  • Supply line not included
  • WaterSense

  • California residents

Info & Guides

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Bowl Height without Seat (in.)
Flush Valve Size (in.)
Product Depth (in.)
29.54 in
Product Height (in.)
30.36 in
Product Width (in.)
15.47 in


Bowl Height
Chair Height
Bowl/Seat Shape
Color Family
Commercial / Residential
No Additional Features
Flushing Technology
Gravity Fed
Flushing Type
Single Flush
Gallons Per Flush
Handle Location
Complete Kit
MaP Performance Rating
Not Rated
Vitreous China
Mount Location
Floor Mount
Product Weight (lb.)
102.10 lb
Rough In Size
12 inch Rough In
Seat Front Type
Toilet Type
Trapway Diameter (in.)
Trip Lever Location
Left Front

Warranty / Certifications

Certifications and Listings
ADA Compliant,ASME Certified,CSA Certified,EPA Approved
Manufacturer Warranty
One-Year Limited Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.5
    out of 6,087 reviews
  • 83% recommend this product
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Showing 1-10 of 6,087 reviews
Easy install
Easy installation with included hardware and it looks great. We are on septic so appreciate the fact that it's HET (1.28 gallons per flush).
    • Recommended
    Missing rubber piece on toilet seat/board. No QC?
    Purchased 3 of these for our remodeling, so far the first one is missing of the 2 plastic pieces that attached to the board (see picture). I searched everywhere inside the box and can't find it. Hopefully the next 2 are going to be better.
      6 people found this helpful
      Nice toilet but needs better quality assurance
      Purchased two - one was perfect but the second had very low water in the bowl because the refill tube (part K-1248134) was kinked. Kohler shipped me a new one, but it took several days. Factory should not have let it ship with this problem.
        • Recommended
        11 people found this helpful
        Dream Toilet
        Great height and comfort. Easy quick and quiet flush. No leaks and very easy to install.
          • Recommended
          Rating provided by a verified purchaser...
          Rating provided by a verified purchaser
          • Verified Purchase
          1 person found this helpful
          A great toilet at a great price. Easy to install. Pick up a thick wax ring and be certain to m...
          A great toilet at a great price. Easy to install. Pick up a thick wax ring and be certain to make sure the tank is secured to the bowl, tighten the nuts and bolts. Highly recommend.
          • Verified Purchase
          • Recommended
          4 people found this helpful
          Installed yesterday 28 June 2021. Elongated toilet flushes better and cleaner. Slow closing toilet lid is a bonus.
            • Recommended
            Being that my toilets were both the standard height water guzzling toilets of old, anything halfw...
            Being that my toilets were both the standard height water guzzling toilets of old, anything halfway decent would be an improvement but so far everything is going well. My plumber did the install on both and he had no complaints. I initially wanted a dual flush for my bathroom but my plumber pointed out this toilet was just as good for water conservation. After that I ordered another for my master bath and I am very pleased with both plus they look so darn good. It has a very quick flush which is strange at first, still a little odd to me, but I keep reminding myself of how old my original units were. With my old toilets you had to grab the handle but with these the gentlest push of the handle does the job. My mother was so impressed with the powerful flush and the quick water refill that I’m thinking of upgrading the toilets at her house as well. As for the seat, I don’t like the light weight plastic but I’m guessing that’s needed for the slow close feature which by the way is a very very slow. I may end up switching the seat out but I purchased this toilet for the size, both of my bathrooms are very small, height, and low water consumption, not the seat. Granted I’ve only had these toilets for a few weeks now but I’m not anticipating any issues. Great toilet with a great price.
            • Verified Purchase
            • Recommended
            21 people found this helpful
            mine came with the wrong toilet seat
            Bought and installed one this evening. The toilet itself seems just fine. Mine came with the elongated seat that doesn't match the round bowl. Quality QC Kohler!! Now I have to try and find another seat that fits this darned thing.
            Response from Kohler Product ExpertMay 7, 2021
            Hi Adam, this is Sarah with Kohler Co. I'm very sorry to hear your item was packaged with the wrong shape toilet seat. This is nothing you should expect when you purchase the quality of Kohler. We are happy to send the correct seat to you. Please email us at KohlerCustServ@kohler.com. Sincerely, Sarah S. Kohler Customer Service
              • Recommended
              13 people found this helpful
              Good flusher
              Great toilet, flushes really well. Not quite white, a bit grey-ish. Nice shape.
              • Verified Purchase
              Showing 1-10 of 6,087 reviews