I cannot vouch for this product either way, as I haven't tried it, however someone posted it on Facebook and I wanted to share with all of you:

"The only automatic cat box that flushes waste
away and, like a cat, washes itself clean.

* Uses permanent Washable Granules that never need changing
* Comfy CatGenie Granules satisfy your cat’s need to dig and cover
* It's your appliance that takes cat litter out of your life for good
* One-time, easy DIY connection to water; set to start automatically
* Tested, used and recommended by veterinarians, nationwide"

http://www.catgenie.com/