Hi DJ, this is Sarah with Kohler Customer Service. I'm glad to answer your question. This toilet is designed to fit in a 12" rough-in. Doing so will provide a 1/2" gap between the back wall and the back of the tank. Thank you for choosing Kohler.
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. Page two of the Kohler Specification sheet shows the total height of this toilet is 28-1/4". A link to the spec sheet is found under the Guides & Documents heading. Thank you for choosing KOHLER.
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. Yes; the trip lever is polished chrome. Thank you for choosing KOHLER.
Yes, this model is equipped with AquaPiston Flush technology.
Hello, my name is Sarah with Kohler CO. I am glad to answer your question. The K-6424 features a skirted bowl for aesthetic purposes and aids in easier cleaning. The height of the toilet is 28-1/4" compared to the K-3812 which is 28-5/8". The width is 18" compared to the K-3812 which is 17-3/4" wide. Lastly, the K-3812 meets ADA compliancy where as the K-6424 does not. Thank you for choosing KOHLER.
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. This toilet requires a 12" rough-in. We do not have any toilets with a 6" rough-in. Please work with your local The Home Depot for pricing and availability on this product. Thank you for choosing The Bold Look of KOHLER.