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Florida Water StarSM Technical Manual

Water-efficient toilet

Water-efficient toilet.

Indoor criteria

Fixtures

Toilets

Background

The Energy Policy Act (EPAct) of 1992 and Florida Building Code requires that both residential and commercial toilets not exceed 1.6 gallons per flush (gpf). Many toilet models on the market today reduce flush volumes below this standard.

Requirements and certification
WaterSense label

All toilets are high-efficiency and are 1.28 gpf, with a UNAR MaP (United North American Requirements maximum performance) rating above 350 grams per flush. WaterSense®-labeled toilets comply.

Silver

Gold

Commercial/Institutional

Required

Required

Required

High-efficiency toilets (with a maximum 1.0 gpf) have a UNAR MaP rating above 350 grams per flush. WaterSense®-labeled toilets comply.

Silver

Gold

Commercial/Institutional

NA

2 points each

NA

To earn additional points, the flush volume cannot exceed 1.0 gpf. Toilets with MaP rates above 600 grams per flush may offer better performance.

Performance Stamp in Toilet Tank

A stamp with the performance values is located inside the toilet tank.

The certifier must field-verify the performance label for each toilet. A stamp with the performance values is located inside the toilet tank.

Program tip

In recent years, utilities have expressed a concern about the use of high-efficiency fixtures in Commercial/Institutional projects. The concern stems from a potential lack of drain-line carry, which occurs when the water volume is insufficient to carry waste through the drain line. This lack of drain-line carry most likely occurs when a building has only lavatories without showers or other higher-volume uses. Project developers should consult with their utilities when drain-line carry might be a concern.

For information about the MaP rating (flushing performance) of a toilet, visit the MaP website and search.

St. Johns River Water Management District
4049 Reid Street, Palatka, FL 32177
800-725-5922