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Learn & Plan Topics

  • Water Efficiency

    Buildings are significant users of the Earth’s freshwater supply. The goal of a responsible building operator should be to encourage a sma...

  • Building Systems Upgrades

    This page details Sustainable Strategies to consider as your space undergoes a building system upgrade to improve energy, water use, and occupant co...
  • Water Consumption

    Between 1950 and 2000, the U.S. population nearly doubled. However, in that same period, public demand for water more than tripled. Americans now...

  • Space Reconfiguration and Renovation Projects

    As needs change over time, tenants often need to convert space or phase the conversion of individual space or rooms to meet these changing needs....

Gallons per flush (gpf)

Gallons per flush (gpf) references the amount of water used per flush in flush fixtures, such as toilets and urinals.

Whole Building Systems

  • Water - Plumbing Fixtures

    High efficiency plumbing fixtures (toilets, urinals, faucets, and showers) can lead to significant water savings. FEMP BMP #6 gives some guidance on...

  • IEQ - Example Questions

    Has the Project Authority approved a building flush-out or bake-off strategy before occupancy?

  • Water - CIEB

    Are there the following water-conserving fixtures: high-efficiency toilets that use less than 1.6 GPF? Ultra low flush urinals that use less than 1....

  • IEQ - IAQ Management

    Construction and renovation projects pose a unique threat to indoor air quality. IAQ management plans should be instated that emphasize the protecti...

Materials

  • Conventional Toilets

    Conventional toilets are those that pre-date Energy Policy Act of  1992 (EPAct 1992) and use 3.5 or more gallons of water per flush.
  • Pressure-Assisted Toilets

    Pressure-assisted toilets use the pressure from the main water line to more efficiently empty the bowl and use less water.
  • Dual-flush Toilets

    Dual-flush toilets have two levels of flushing - a full for solid waste and a reduced flush for liquid waste. Typically full flushes range f...
  • Conventional Urinal

    Conventional urinals are those that pre-date Energy Policy Act of  1992 (EPAct 1992) and use 1.5 or more gallons of water per flush.
  • Low-Flow Urinal

    Low-flow urinals are based upon the Energy Policy Act of 1992 (EPAct 1992) and use 1.0 or less gallons of water per flush (gpf). Relative to ear...
  • High-Efficiency Toilets

    High-Efficiency toilets are those that use 1.28 or less gallons of water per flush gpf. Also included are composting toilets which require litt...
  • High-Efficiency Urinal (HEU)

    High-Efficiency urinals are available in varying levels of water use, from 0.5 gpf to 0.125 gpf. Also included are waterless urinals which re...
  • Low-Flow Toilets

    Low-flow toilets are based upon the Energy Policy Act of 1992 (EPAct 1992) and use 1.6 or less gallons of water per flush (gpf).  Relative to...