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Kelston 1.6 GPF Single Flush Toilet Tank Only with AquaPiston Flushing Technology in White

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  • Combines with the K-4306 bowl
  • Toilet Bowl & Supply line not included
  • Class Five® flushing technology
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Product Overview

Bring warmth and elegance to your bathroom with the Kelston collection With a robust 1.6 Gal. flush and stylish design, this Kelston toilet tank makes an excellent choice for your bath or powder room. Pair it with a coordinating bowl for a complete toilet.
  • 1.6 gallons per flush (GPF)
  • Standard left-hand trip lever included
  • Combines with the K-4306 bowl to create a complete K-3754 Kelston toilet
  • Coordinates with other products in the Kelston collection
  • Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong siphon during flushing
  • AquaPiston canister allows water to flow into the bowl from all sides (360°), increasing the power and effectiveness of the flush
  • Flush valve's 3: 2 ratio harnesses the natural force of gravity and optimizes flush performance
  • Durable canister design has 90% less exposed seal material than a 3 in. flapper, for leak-free performance
  • Light-touch canister flush requires a lower actuation force than a flapper
  • AquaPiston canister flush valve optimizes flush performance and resists warping and deterioration.

    Kohler AquaPiston Flushing Technology

Additional Resources

From the Manufacturer

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Flush Valve Size (in.)3.0Product Depth (in.)8.9375 in
Product Height (in.)14.0 inProduct Width (in.)16.75 in


Collection NameKelstonColor FamilyWhite
Color/FinishWhiteCommercial / ResidentialResidential
FeaturesNo Additional FeaturesFlushing TechnologyGravity Fed
Flushing TypeSingle FlushGallons Per Flush1.6
IncludedHandleMaterialVitreous China
Models used withK-4306Product Weight (lb.)30 lb
Returnable90-DayStyleArt Deco,Bohemian,Classic,Coastal,Cottage,Farmhouse,Glam,Industrial,Mediterranean,Mid-Century,Minimalist,Mission,Modern,Rustic,Southwestern,Transitional
Trip Lever LocationLeft Side

Warranty / Certifications

Certifications and ListingsADA CompliantManufacturer WarrantyOne-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 41 reviews
  • 85%recommend this product
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Showing 1-10 of 41 reviews
Issues with Tank
I chose this toilet because it was the highest rated one by Consumer Reports. FIRST MAJOR ISSUE: Home Depot has this bowl and tank combo in their online inventory. But they listed it as NOT AVAILABLE! However, the same bowl and tank could be purchased from Home Depot SEPARATELY, but at a significantly higher price! When I called a Home Depot representative to complain, she confirmed that what I was stating was true. But she did not know why? She was kind enough to provide a discount that lowered the price of the two items down to around the cost of the “complete” toilet. The two boxes were to delivered to my home on Sunday. The driver was supposed to call me 30-minutes before delivery so that I would be prepared. I asked that it left in the driveway so that I could use my two-wheel hand truck to bring the boxes into my garage. This was GREAT! I am 74 years old and didn’t want to lift those boxes. SECOND ISSUE: Instead, the boxes were delivered on Saturday to my front door (which had a number of steps leading into the house). Also there was no phone call by the driver. I had to pick up the two boxes and manually bring them up the stairs into my home. I am glad I did not hurt myself. So, instead of the toilet bowl and tank being placed in the garage for the plumber to bring into the bathroom, it sat in my living room! THIRD ISSUE: Despite effort by the plumber, the tank WOBBLES. No water has leaked out of it (we have been using it for a couple of weeks) so far. If it begins to leak, I may have to replace it (or the whole toilet). FOURTH ISSUE: The cover to the tank also WOBBLED. I could not find any issue on either the rim of the cover or on the top of the tank to explain it. I finally got it to sit without wobbling, but there seems to be a GAP between the cover and the tank. If my wife is unhappy with it, I may have to get another cover or replace the tank/cover or simply return the whole toilet. FIFTH ISSUE: I wish that I had a chance to see this toilet in the store. We are not happy with the PLACEMENT of the HANDLE. It sits half-way between the front and back of the tank. We prefer handle to face towards the front of the toilet rather than to the back. I reviewed the photos for this toilet. The pictures reflect the way it is installed. This is a minor issue, but it causes us to reach further (and is more awkward) to flush the toilet. I am not a happy camper.
Response from Kohler Product ExpertApr 27, 2022
Hi Richard, we are sorry to hear about the disappointment you have had with the delivery and performance of your Kelston toilet. We appreciate your feedback and I would love to connect with you directly to assist with the tank lid wobble and learn more about the tank/bowl wobble. In most cases, if there is no leaking, the little movement there is between the tank and bowl is safe and normal. Please email our team directly at KohlerCustServ@kohler.com. Sincerely, Sarah S. Kohler Customer Service.
  • Verified Purchase
  • Verified Purchase
  • Verified Purchase
An Impressive Disappearing Act
This Kohler Aquapiston system is impressive! When I press & release the handle, everything simply *disappears*, quickly and quietly. That's the best way to put it. You can hold the handle down for a few seconds and the tank will pretty much empty, but so far, not necessary. I'm so impressed that I'm tempted to just flush recreationally now and then. I've only had this unit for a few weeks, so time will tell about its durability.
    • Recommended
        Great toilet! My wife loves the seat height and...
        Great toilet! My wife loves the seat height and the fact that it's eco-friendly at 1.6 GPF. We can now take advantage from the saving that a low-flush toilet provides.
          Great technology on the tank....
          Great technology on the tank.
            Fast clen bowl, 1 flush.
            Fast clen bowl, 1 flush.
            • DIY
            • Verified Purchase
            • Recommended
            • Verified Purchase
            Showing 1-10 of 41 reviews