Mandatory Checklist Requirement: All toilets must be WaterSense® labeled.

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UNDERSTAND
WaterSense labeled toilets have a maximum flush volume of 1.28 gallons per flush (gpf), which is 20
percent lower than the current U.S. federal standard.
The WaterSense Specification for Tank-Type Toilets and WaterSense
Specification for Flushometer-Valve Water Closets, as applicable, also
establish criteria for toilet performance and markings.
WaterSense labeled toilets are independently certified for efficiency and
flush performance and must also meet requirements of the applicable
national standard for toilets, ASME A112.19.2/CSA B45.1 Ceramic
Plumbing Fixtures.
WaterSense specifications cover both single- and dual-flush toilets.
BUILD
USE the WaterSense Product Search Tool at
www.epa.gQv/watersense/product-search to identify and specify toilet
models that have earned the WaterSense label.
CONFIRM toilets are properly installed to prevent leaks.
CHECK that all toilet components, such as flappers, flush
valves, and fill valves, are connected and working properly
at time of installation.
Look for Leaks
VERIFY
•	OBTAIN the makes and model numbers for all toilets in a
home. Use the WaterSense Product Search Tool to
confirm that all toilets are WaterSense labeled.
•	CHECK the gpf marking on the fixture or inside the tank.
•	CONFIRM that no leaks are present through visual
inspection and dye tablet test in toilet tank (see the "Free
of Leaks" informational fact sheet).
*NOTE: Consult with the Home Certification Organization for
specific verification protocols.
Learn More
Visit WaterSense's Residential Toilets web page
atwww.epa.gov/watersense/residential-toilets
to learn more about WaterSense labeled toilets.
Misaligned or warped toilet flappers, flush
valves, or other flushing mechanisms can
cause undetected leaks that waste
significant amounts of water over time.
Conduct a simple water dye test to check
for toilet leaks (see the "Free of Leaks"
informational fact sheet for details).
Replace the flush mechanism if
necessary.
Getting a Handle on Dual Flushing
If selecting dual-flush toilets, make sure
the buttons or handles are intuitive so
homeowners and residents select the
appropriate flush setting and achieve the
desired water savings. Provide an owner's
manual that explains which flush is
which.
This technical fact sheet is part of EPA's Technical Reference Manual for
WaterSense Labeled Homes. For the full document and other tools and	EPA-832-F-23-016
resources for homes, visit www.epa.gov/watersense/tools-and-resources.	July 2023

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