WE1: High Efficiency Water Fixtures

(1-5 points)

PURPOSE

Reduce the amount of potable water used by installing efficient fixtures.

CRITERIA

Increase the efficiency of water use in the building design by specifying high efficiency fixtures.

Select all applicable options:

Option A. High Efficiency Toilets and/or Dual Flush Toilets (2 points)

Specify toilet fixture with a 1.0 GPF maximum or dual flush toilet fixture with a full flush 1.06 GPF and partial flush 0.8 GPF (or equivalent of 0.89 GPF)

Dual Flush Calculation:

To calculate the equivalent gallons per flush for dual flush toilets, simply add one full flush and two half flushes and divide by three. For example, a dual flush toilet that provides 1.6 GPF for solid and 0.5 GPF for liquid waste results in 0.69 GPF equivalent, as compared to the standard toilet water use.

𝑑𝑢𝑎𝑙 𝑓𝑙𝑢𝑠ℎ 𝑒𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡 = (𝑓𝑢𝑙𝑙 𝑓𝑙𝑢𝑠ℎ) + (ℎ𝑎𝑙𝑓 𝑓𝑙𝑢𝑠ℎ) + (ℎ𝑎𝑙𝑓 𝑓𝑙𝑢𝑠ℎ) 3 = 1.06 + 0.8 + 0.8 3 → 𝟎. 𝟖𝟗 𝒈𝒑𝒇

Option B. Pint Flush or Waterless Urinals (1 point)

All installed urinal fixtures must use 0.125 GPF or less.

Option C. Automatic Faucets (1 point)

Projects are to specify all automatic faucets to fulfill credit.

Option D. High Efficiency Showerheads (1 point)

All showerheads installed in the project are 1.5 GPM or less

VERIFICATION 

• Construction Documents should list fixture schedule with flush volumes and flow rates. 
• Manufacturer’s documentation must include the WaterSense® mark if applicable 
• Inspection by ECLC Technical Advisor