A normal modern residential gravity-feed toilet uses 1.28 to 1.6 gallons of water per flush, adhering to federal high-efficiency standards. Older legacy toilets manufactured before 1994 typically use 3.5 to 5 gallons per flush. High-efficiency dual-flush toilets often use an even smaller half-flush volume of around 0.8 to 1.0 gallons for liquid waste and 1.28 to 1.6 gallons for solid waste. Verification: Check the manufacturer label stamped inside the toilet tank or on the porcelain rim to confirm the exact gallon-per-flush rating.
1 votes
Marked as accepted