From: Flush with Options.

One- and two-piece Gwyneth high-efficiency toilets feature a 1.28-gpf gravity-fed double-cyclone flush engine. The toilet is WaterSense certified and qualifies for select water utility rebate programs, the manufacturer says. The unit is 17 inches from base to seat, and it cleans itself during each flush as water from two nozzles removes debris and bacteria from the concave rim channel, the company says. 888.295.8134. www.totousa.com.