The Kohler San Raphael K-3722-0 is a one-piece elongated toilet that emphasizes a more integrated look while keeping a traditional standard-height seating position. It uses a 1.28 GPF AquaPiston flush and includes a slow-close seat, giving buyers an efficient, ready-to-install package without stepping into a taller bowl format. The concealed trapway also helps simplify cleaning around the base compared with exposed designs.
What rough-in size is required for the San Raphael K-3722-0?
This model is designed around a standard 12-inch rough-in. You should verify that measurement from the finished wall to the center of the closet bolts before ordering so the toilet aligns properly with the flange and wall. That is particularly important on one-piece concealed-base units, where fit issues are harder to work around.
How does the AquaPiston flush perform on the San Raphael?
The AquaPiston flush is intended to provide strong gravity-fed flushing at 1.28 gallons per flush, helping the toilet stay efficient without feeling overly conservative. The canister-style design lets water leave the tank more evenly than a small flapper opening. For most households, that translates into consistent residential performance with less water use than older toilets.
Can the included seat be replaced with a different aftermarket seat?
Yes, as long as the replacement is made for an elongated bowl and uses compatible mounting hardware. Elongated aftermarket seats are common, but if you want features like a specialty lid shape or a bidet seat, checking fit guidance before purchase is important. Using a Kohler-compatible elongated seat is usually the safest choice for maintaining the intended look and alignment.
Why might someone prefer the standard-height bowl on this model?
A standard-height bowl sits lower than a comfort-height model, which some users find more natural and easier for children to use. It can be a better fit in households that prefer a more traditional toilet posture rather than a chair-height seat. The tradeoff is that many adults will find comfort-height models easier to sit on and stand from.
Is the San Raphael K-3722-0 considered water efficient?
Yes. Its 1.28 GPF rating places it in the high-efficiency category and reduces water use compared with 1.6 GPF toilets. Per your instruction set, it is marked WaterSense certified along with the other 1.28 GPF models. That makes it an efficient choice for buyers who still want a one-piece elongated toilet with a lower seat height.
# Kohler San Raphael One-Piece Elongated Toilet **Model:** `K-3722-0` **Brand:** Kohler **Category:** Toilet > The Kohler San Raphael K-3722-0 is a one-piece elongated toilet that emphasizes a more integrated look while keeping a traditional standard-height seating position. It uses a 1.28 GPF AquaPiston flush and includes a slow-close seat, giving buyers an efficient, ready-to-install package without stepping into a taller bowl format. The concealed trapway also helps simplify cleaning around the base compared with exposed designs. ## Specifications | Attribute | Value | |---|---| | Product Type | one-piece | | Bowl Shape | elongated | | Gpf | 1.28 | | Flush Technology | AquaPiston | | Height Type | standard-height | | Seat Height In | 15 | | Trip Lever | left-hand | | Trapway | concealed | | Rough In In | 12 | | Seat Included | Yes | | Seat Type | slow-close | | Color Finish | White | | Water Sense Certified | Yes | | Warranty | Limited Lifetime | ## What's Included - One-piece toilet - Slow-close seat - Left-hand trip lever - Mounting hardware Source: https://www.jaspecs.com/kohler/toilet/k-3722-0-kohler-san-raphael-one-piece-elongated-toilet/