Sources

Sources

Outside pages quoted in our guides, with the date each one was read. Product facts come from the maker's own specifications.

• U.S. Environmental Protection Agency, WaterSense, Residential Toilets, read 28 September 2026.

  Design improvements have allowed toilets to use 1.28 gallons per flush or less while still providing equal or superior performance. This is 20 percent less water than the current federal standard of 1.6 gallons per flush.

• Poison Control (poison.org), What's in drain cleaner and what happens if you drink it?, read 28 September 2026.

  Drain cleaners that contain corrosive or caustic chemicals can cause pain, irritation, and burns when they come into contact with skin.