Last Updated : November 19, 2020

Kohler K-3851-0 Cimarron Toilet Review

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The Kohler K-3851-0 is a two-piece toilet that allows for easy installation into areas that require a rough-in of 10 inches. You don’t have to sacrifice quality with this 10-inch rough-in toilet, as Kohler provides the best features in this Cimarron model.

Product Overview

The two-piece design of this toilet allows you to spend a little less while still getting all the benefits that other one-piece models provide. You can also decide to replace your toilet bowl with an upgraded bowl later on without replacing your tank. This design is more beneficial than having a one-piece design in which you would be forced to replace your entire toilet and tank combo. This two-piece combination consists of the K-4829 bowl and the K-4166 tank.

Kohler K-3851-0

  • Round-front bowl
  • 1.28 gallons per flush (gpf)
  • 2-1/8-inch glazed trap way
  • Why we like it: The best feature this toilet has to offer is the use of an AquaPiston canister because it allows for 360° water flow—this increases the toilet’s flushing power and effectiveness. 

The round-front bowl is a design aspect that works well with smaller bathrooms. While many people enjoy the comfort that comes with an elongated toilet bowl, smaller bathrooms sometimes can’t fit a long toilet. If you have a compact area to work with, this round front design allows for easy installation and comfortable seating.

Although the round-front bowl isn’t commonly as comfortable as the elongated bowl, what makes up for this bowl style is the bowl height. This Kohler toilet includes a Comfort Height feature that provides more comfortable sitting for a wide variety of people. Instead of the standard height that most older toilets use, this toilet features chair-height seating that makes sitting down and standing up easier for most adults.

If you are looking for water savings, you’re in the right place. This toilet features a 1.28GPF that saves a lot of water. Compared to the standard 3.5 gallons per flush, this toilet is more than twice as water-efficient and saves you up to 16,500 gallons of water per year on average. Some newer toilets are offered at 1.6GPF, and this Kohler Cimarron beats them in water efficiency as well.

Kohler doesn’t compromise their flushing power with water efficiency, either. The Cimarron model offers the same Aqua Piston flush technology as their best models do so that you can be assured of a powerful flush. Besides this powerful technology, this toilet also includes Kohler’s canister flush valve system. This powerful system eliminates clogs without wasting water and ensures that even large amounts of waste are removed with every flush.

Combining water savings, comfort, and flushing performance, the Kohler Cimarron is an excellent toilet for your compact bathroom needs.

Extreme water savings

The most significant feature of Kohler’s Cimarron K-3851-0 model is the extreme water savings you receive. Comparing this toilet to a 3.5 gallon-per-flush standard toilet, you are saving up to 16,500 gallons of water per year. When you think about how much your water bill is each month, you might consider just how much money you can save with a toilet like this.

Newer model toilets commonly have better water efficiency than the 3.5GPF models. However, their 1.6GPF models don’t compare to Kohler Cimarron’s 1.28GPF. This toilet saves more water than even the newest toilets, which also saves you more water and more money than most.

A top-rated 10-inch rough-in toilet

Kohler has truly made leaps in their technology to provide high-quality toilets in all of their models. The Cimarron model is no different.

Their comfort height bowl makes for more relaxed sitting. The round-front bowl design works perfectly for compact bathrooms. The style of the toilet is curvy and sleek. The water savings are the best in its class. Its flushing technology is robust and ahead of the game. With all the features this toilet provides, the Kohler K-3851-0 Cimarron makes for a top rated toilet with 10 inch rough in.


● Comfort height - The taller height of the bowl makes it easier for adults to sit on and stand up from the toilet.
Flushing performance - The features that Kohler includes with their innovative flushing technology provides powerful flushing performance.
Water-efficient - This 1.28GPF toilet is WaterSense certified and will save you more water and money than any other toilet in its class.
Two-piece design - The two-piece design is budget-friendly and allows you to replace your toilet bowl instead of the whole unit.


● The toilet seat and supply line are not included and must be purchased separately.
● Round-front bowls are commonly less comfortable than elongated bowls. However, a round-front bowl might be necessary for compact bathrooms that need the space.


Kohler includes all the features you are looking for in this two-piece toilet. Even with a round-front bowl, the comfort height provides added comfortability. Its flushing performance is innovative. The water efficiency of 1.28 gallons-per-flush saves you water and money on your bills. The toilet is compact and has an attractive design. If you want a 10-inch rough-in toilet that provides powerful performance and sleek design, the Kohler K-3851-0 Cimarron is a solid choice.

Charles Cole

Hello. My name is Charles. I have been in the home improvement industry for a number of years. One of the most important renovations that home owners can make is a bathroom upgrade. Not only does it add significant value to your home, but it also costs a fair amount to do. Bathroom renovations are not frequently undertaken so choosing your sanitaryware can be source of enjoyment or regret for years to come. This is definitely the case for toilets. Read more about me and the site here.

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