About the Toilets
They're called Ultra Low Flush Toilets (ULFT)s. Some are gravity fed (use a flapper or flapperless). ALL of them use 1.6 gallons per flush.
Gravity Fed Toilets
We use the gravity fed models in our programs and we stick to the brands that have worked in the past. We know what works through our experience of having distributed over 500,000 toilets.