For a basic Kohler seat that lifts off for cleaning, choose the Brevia K-4774; for Quiet-Close, the Brevia K-20110; for a round toilet, the Cachet ReadyLatch K-4639-RL; for a built-in nightlight, the Cachet Nightlight K-75796-RL. Measure your bowl first: round and elongated seats are not interchangeable.
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This guide covers Kohler plastic toilet seats.
Kohler toilet seats compared
| Seat | Shape | Key feature |
|---|---|---|
| Brevia K-4774 | Elongated | Quick-Release for cleaning, residential use |
| Brevia K-20110 | Elongated | Quiet-Close, recommended for nonresidential use |
| Cachet ReadyLatch K-4639-RL | Round-front | ReadyLatch hinge, Quiet-Close, installs from above |
| Cachet Nightlight K-75796-RL | Elongated | Battery LED nightlight, ReadyLatch, Quiet-Close |
Kohler seats come in two main families here. Brevia is the simpler line; Cachet adds Kohler’s ReadyLatch hinge and Grip-Tight hardware that installs from above the bowl. All four are plastic with color-matched plastic hinges and Grip-Tight bumpers that Kohler says hold the seat firmly in place.
Brevia K-4774: quick-release basic
Choose the Kohler Brevia K-4774 for a simple, easy-to-clean elongated seat. Kohler lists (resources.kohler.com) an elongated closed-front plastic seat with Grip-Tight bumpers, Quick-Release hinges so the seat comes off for cleaning, Quick-Attach hardware, color-matched plastic hinges, a contoured seat, 5-1/2-inch mounting holes, IAPMO/ANSI Z124.5 and a one-year limited warranty. Kohler says it is for residential use only.
On October 15, 2026, the standard new offer sold by Amazon.com was available to add to the cart with model K-4774-0.
Check Kohler Brevia K-4774-0 elongated toilet seat on Amazon →
Brevia K-20110: quiet-close
Choose the Kohler Brevia K-20110 if you want a seat that will not slam, or for a rental or shared bathroom. Kohler lists (resources.kohler.com) a Quiet-Close elongated lid and seat that prevents slamming, Grip-Tight bumpers, Quick-Attach hardware and color-matched plastic hinges, with a one-year limited warranty. Kohler’s K-4774 spec sheet names the K-20110 among the seats recommended for nonresidential use.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 20110-0.
Check Kohler Brevia K-20110-0 quiet-close toilet seat on Amazon →
Cachet ReadyLatch K-4639-RL: round-front
Choose the Kohler Cachet K-4639-RL for a round toilet. Kohler lists (resources.kohler.com) Grip-Tight installation hardware that fastens from above the bowl, a ReadyLatch hinge with a positive lock and unlock latch so the seat removes easily for cleaning or adjusting fit, a Quiet-Close round-front lid and seat, Grip-Tight bumpers, a contoured seat and color-matched hinges, in white and several colors including biscuit, almond, Ice Grey and black.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 4639-RL-0.
Check Kohler Cachet ReadyLatch K-4639-RL-0 round toilet seat on Amazon →
Cachet Nightlight K-75796-RL: built-in nightlight
Choose the Kohler Cachet Nightlight for nighttime trips without switching on bright lights. Kohler lists (resources.kohler.com) dual LED lighting that guides when the lid is down and gives task light when it is lifted, three brightness levels, an automatic 10-hour nightlight cycle, battery operation with no cords, up to 12 months of battery life on four AA batteries (not included), plus the ReadyLatch hinge, Grip-Tight hardware and Quiet-Close lid and seat.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 75796-RL-0.
Check Kohler Cachet Nightlight K-75796-RL-0 toilet seat on Amazon →
Round or elongated?
Measure from the center of the two seat bolts to the front edge of the bowl. Roughly 16-1/2 inches is round; roughly 18-1/2 inches is elongated. Kohler lists the Brevia K-4774 and K-20110 as elongated and the Cachet K-4639-RL as round-front; the Cachet Nightlight here is elongated. Our toilet seat size guide explains measuring, and our round vs elongated guide covers the bowl shapes.
ReadyLatch vs Quick-Release
Both let the seat come off for cleaning. Kohler describes ReadyLatch as a hinge with a positive lock and unlock latch that holds the seat securely yet releases it for cleaning or adjusting fit, with hardware that fastens from above the bowl. Quick-Release on the Brevia K-4774 also lets the seat lift off for cleaning. Installing from above, as with Cachet’s Grip-Tight hardware, saves reaching under the bowl to hold a nut.
Matching a Kohler toilet
Kohler seats are made to fit most toilets of the right shape, not only Kohler bowls. If you have a Kohler toilet, matching the color code is easy: Kohler uses the same codes, such as 0 for white and 96 for biscuit, across toilets and seats. Our Kohler toilet guide covers the bowls themselves.
Other seat types
If you want more than a plastic seat, our wood toilet seat guide covers Kohler’s wood seats, our heated toilet seat guide covers warmed seats, and our bidet seat guide covers washing seats. For picks across brands, see our toilet seat guide.
Colors to match older fixtures
Kohler sells the Cachet K-4639-RL in white, biscuit, almond, Dune, Ice Grey, Sandbar, Cashmere, Thunder Grey and Black Black, and the Cachet Nightlight in a similar range, according to Kohler. The Brevia K-4774 comes in white, biscuit and almond. If your toilet is an older colored fixture, check the color code on the toilet, sometimes printed inside the tank or in the paperwork, and match it so the seat does not stand out. Color tiles on screens are only a guide.
Seats for busy or shared bathrooms
In a bathroom used by many people, a Quiet-Close seat prevents the slam that cracks seats and lids over time, and Kohler names the Brevia K-20110 among its seats recommended for nonresidential use. Grip-Tight bumpers help keep the seat from shifting side to side, a common annoyance with loose seats. For a home with kids, a seat that removes for cleaning, like a ReadyLatch or Quick-Release model, makes the job much easier.
When a seat keeps loosening
A seat that slides or works loose usually has worn bumpers, stripped plastic hardware or hinges that were never fully tightened. Kohler’s Grip-Tight hardware and bumpers are designed to hold the seat firmly in place, according to Kohler. Re-tighten the hardware as the instructions direct, and replace a seat whose bumpers are missing or whose hinges are cracked. If the bowl rocks rather than the seat, the problem is the toilet’s mounting, not the seat.
Installing a Kohler seat
Remove the old seat by unscrewing the nuts under the bowl or the caps on top, depending on the hardware. Clean the area around the mounting holes. For Cachet’s Grip-Tight hardware, insert the anchors from above and tighten them from above the bowl as Kohler’s instructions describe; for Brevia’s Quick-Attach hardware, follow its steps. Center the seat over the bowl before the final tightening, and check that the lid and seat close straight.
Frequently asked questions
Which Kohler toilet seat is best?
The Brevia K-4774 is a simple quick-release seat, the Brevia K-20110 adds Quiet-Close, the Cachet K-4639-RL suits round toilets, and the Cachet Nightlight adds a battery LED light.
What is Kohler ReadyLatch?
A hinge with a positive lock and unlock latch that holds the seat securely but lets it come off for cleaning or adjusting fit, according to Kohler.
Do Kohler seats fit other brands of toilets?
Kohler says these seats fit most round-front or most elongated toilets, depending on the model.
How long do the Cachet Nightlight batteries last?
Kohler lists up to 12 months on four AA batteries, not included.
Is the Brevia K-4774 for commercial use?
No. Kohler says it is for residential use only and recommends the K-20110 among others for nonresidential use.
How we chose
This document-based guide makes no hands-on testing claim. We read Kohler’s spec sheets for the Brevia K-4774 and K-20110 and the Cachet K-4639-RL and K-75796-RL. On October 15, 2026, all four linked standard new offers were sold by Amazon.com and showed stock or add-to-cart availability. Read our selection method and about Plumbing Picks.
Primary sources
- Kohler Brevia K-4774 spec sheet (resources.kohler.com): Quick-Release, hardware, mounting holes, residential note, warranty.
- Kohler Brevia K-20110 spec sheet (resources.kohler.com): Quiet-Close, hardware, warranty.
- Kohler Cachet K-4639-RL spec sheet (resources.kohler.com): ReadyLatch, Grip-Tight from above, Quiet-Close, round-front, colors.
- Kohler Cachet Nightlight K-75796-RL spec sheet (resources.kohler.com): dual LED, brightness levels, 10-hour cycle, 4 AA, 12-month battery, ReadyLatch.