Implementing 'Toilet Toppers' in a 400-unit apartment building can save 1.75 million gallons of water annually, resulting in $35,000 in net profit.
"14.6 million gallons of water are used in your building I'm going to say toilet Toppers in use that saves you 1.75 million gallons of water at the cost of 2 cents per gallon which is the average that saves you $35,000 a year in net profit"