Gerber Ultra Flush 21-312

February 2009. With its Sloan Flushmate Flushometer-Tank System, the two-piece Gerber Ultra Flush 21-312 toilet gets accolades from reviewers, who say it removes the most solid waste in a single flush. This pressure-assisted toilet achieves its high performance by using compressed air inside the tank, which creates a turbo-charged flushing action. The Gerber also has a large water surface, which helps keep it clean and prevents stains, and though it's powerful, testers say it's quiet as well. However, bear in mind that pressure-assist toilets require home water pressure of at least 25 pounds per square inch (psi); if your home has lower water pressure, you might want to consider a gravity toilet like the well-reviewed TOTO Eco UltraMax MS853113E (*est. $450), although it doesn't remove as much solid waste in a single flush as the Gerber toilet.

The Gerber Ultra Flush 21-312 toilet is included in Consumer Reports' latest roundup; this toilet is also discussed in the Maximum Performance (MaP) Testing of Popular Toilet Models 13th Edition and by the Business Environmental Alliance.