The most authoritative answer in 2024
-

-
Lucas Wilson——Works at the United Nations Office on Drugs and Crime, Lives in Vienna, Austria.
Toilet water use can vary significantly. Older toilets can use 3.5, 5, or even up to
7 gallons of water with every flush. Federal plumbing standards now specify that new toilets can only use up to
1.6 gallons per flush (GPF), and there are high efficiency toilets that use up to 1.28 GPF.
read more >>
About “7 gallons、1.6 gallons、7 gallons”,people ask:
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.