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So you’ve been toilet shopping and have decided that Kohler is the right brand for you – but how do you know which model is best? Well we can’t make that decision for you but we can share our expert review of their San Raphael one-piece model to help you decide if it has the features that you need.
Its sleek, low-profile tank makes it stand out among other single-piece toilets and features an elongated bowl for additional comfort.
Review of the Kohler San Raphael Toilet in 2025
Our team collected facts and reviewed the San Raphael toilet, while looking at the features and benefits too.
“With its overhanging lid design, The San Raphael is a stylish toilet that fits into any bathroom aesthetic.”
› Flush System – Siphon jetWhat is a AquaPiston 360° Gravity Flush?Flapper-less design using a canister. Water rotates 360 degree into the bowl, creating a powerful flush.
› Water Consumption – 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
› Type – SingleFlush Type ExplainedA single flush is one press of the lever for a full flush. A dual flush allows the option for a partial or full flush.
› Flush Score – 800 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
Design & Style
› Style – One-PieceStyle ExplainedTwo-piece toilets has a separate tank and bowl. One-piece toilet has a seamless design of the tank and bowl.
› Bowl Shape – ElongatedShape ExplainedElongated bowls are oval shaped and 2” inches wider than round bowls
› Bowl Glaze – N/A
› Trapway Style – Concealed
Dimensions
›Toilet Measurements – 29″ x 20-1/2″ x 24″
› Rough-inWhat is a Rough-in?Measurement between center of waste pipe and wall – 12″
› Trapway SizeWhat is a Trapway?S-shaped curved channel inside the base of the toilet. Waste travels from the bowl through the trapway, then out the bottom of the toilet. – 2-1/16″
› Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. – 15-3/4″
› Rim Height – 15″
See toilet dimensions
This model has all of Kohler’s best features and a little extra.
Flush Ability
The San Raphael is a Water-sense certified toilet that uses 1.28 gallons per flush, saving you thousands of gallons of water annually.
The canister flush valve provides a convenient flushing operation and is powerful enough to get rid of clogs without wasting extra water.
Furthermore, the glazed, skirted trapway increases the efficiency of the flushing system; that means reduced chance of clogs or leaks.
Design
Right off the bat, the one-piece toilet catches your attention.
The seamless integration of the tank and bowl takes away any nooks and crannies where dirt and grime can hide.
The skirted trapway also eliminates spots for bacteria to accumulate, so you don’t have to worry about intense weekly scrubbing; the San Raphael only needs a wipedown every once in a while.
The San Raphael has a seat height of 15-3/4″ and an elongated bowl to increase user comfort by dispersing body weight.
While the toilet’s height is average, it’s important to note that it’s not ADA compliant so it won’t be accessible to all potential users.
The toilet comes with a Quiet-Close elongated seat to eliminate unintentional slamming.
The Quiet-Close seat also comes with Quick-Release hinges, making cleaning yet again!
The Santa Raphael is only available in the classic white color.
Optional Accessories
If you’re interested in upgrading the San Raphael, there are plenty of compatible Kohler products you can purchase.
The Cachet Nightlight Quiet-Close elongated seat has all the best elements as the traditional Quiet-Close seat with the added bonus of a night light for nighttime bathroom visits.
For heated seats, a 1362736 mounting plate is required. The C³®-23 elongated bidet seat with remote takes your toilet to the next level with adjustable bidet settings.
Users like the toilet’s look and feel, praising its unique build. The Quiet-Close seat is a big hit, as many models usually require you to purchase it separately.
The most common complaint is the toilet’s state upon arrival. Multiple users claim that the first time around they received the toilet in pieces and had to contact Kohler support for another model.
Flush Ability
Flush Ability