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Sarah S. 

I am a huge Kohler fan.  I have a lot of their products.  I received three of these as a replacement for one piece toilets that did not rinse.  This system has the capability to flush well with chlorine tablet dispensing.  All good ideas.  The problem is that the bowl base is about 1.25" longer behind the flange than a standard toilet.  
 That places it about 1.5 inches from the wall.  The width of the rear of the toilet is 10" wide at the very back of the base.    Kind of like an inverted ark!.  Kohler does not publish any dimensions to warn the customer.  This is a big bowl.  Both conditions result in interference with my existing isolation valve.  I do not want to do that and I just merely need a good toilet that flushes and fits.  I will be avoiding Kohler toilets only, for a long time.  All other products are great.  I purchased another brand today.

Good  and bad

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Elongated toilet bowl with skirted trapway

Bring powerful flushing and easy-care design to your bathroom with the KOHLER Irvine elongated toilet bowl with skirted trapway. Revolution 360® flushing technology generates a forceful swirling motion to keep the bowl cleaner longer than a conventional flush. The CleanCoat® surface treatment inhibits the growth of water scale and mineral stains for improved ease of cleaning, while the skirted trapway simplifies care. The Comfort Height® feature provides chair-height seating that makes sitting down and standing up easier for most adults. ReadyLock® installation eliminates the need to drill into the floor for a standard 12" rough-in. Pair with a compatible Irvine tank to complete the toilet.

The K-20485 elongated toilet bowl delivers powerful, swirl-style flushing in a contemporary skirted design. Installation is easy with the ReadyLock system.

Irvine®Elongated toilet bowl with skirted trapway

Irvine®
Elongated toilet bowl with skirted trapway