TP – 1173 An Introduction to Water Conservation in Office and Residential Buildings for Professional Engineers

The Energy Policy Act of 1992 contains strict water consumption limits for several newly manufactured commercial plumbing products. As of January 1, 1994, all new toilets must use no more than 1.6 gallons per flush (gpf) or 6.0 liters per flush (lpf), all new urinals no more than 1.0 gpf (3.9 lpf), and new shower heads and faucets no more than 2.5 gallons per minute (gpm) or 9.5 liters per minute (lpm).