ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -According to federal plumbing rules, new toilets can use up to 1.6 gallons per flush. Recent advancements have allowed toilets to use 1.28 gallons per flush or less while still providing equal or superior performance.

Detailed explanation-2: -Federal plumbing standards now specify that new toilets can only use up to 1.6 gallons per flush and high efficiency toilets that use up to 1.28 gallons.

Detailed explanation-3: -The drive to innovate started in 1994, when the 1.6-gallons-per-flush (gpf) mandate went into effect, replacing the 3.5 to 5 gpf that had been the norm.

Detailed explanation-4: -Reacting to these programs, by the mid 2000s, the market for toilets had already begun transitioning from 1.6 gpf models to high-efficiency toilets with flush volumes of 1.28 gpf.

Detailed explanation-5: -gallons/minute. WaterSense certified toilets are guaranteed to use 1.28 gallons per flush (gpf) or less. Since 1994, national standards required only toilets using no more than 1.6 gallons per flush (gpf) be sold.