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Mandatory Checklist Requirement: All bathroom sink faucets must be WaterSense® labeled.
UNDERSTAND
WaterSense labeled bathroom sink (lavatory) faucets use a maximum of 1.5
gallons per minute (gpm) at 60 pounds per square inch (psi) of water pressure,
which means the faucet's water flow is at least 30 percent lower compared to
the U.S. federal standard flow rate of 2.2 gpm.
WaterSense labeled bathroom sink faucets are also tested to provide no less
than 0.8 gpm at 20 psi of water pressure, ensuring they provide adequate flow
for typical bathroom activities (e.g., face washing, shaving} without sacrificing
performance at lower pressures.
WaterSense labeled bathroom sink faucets are
independently certified for water efficiency and
performance and meet expected life cycle and
lead-free requirements of the national standard
forfaucets, ASME A112.18.1 /CSA B125.1
Plumbing Supply Fittings.
They are available at a wide variety of price points
and styles. For greater efficiency or to meet local
requirements, many models are available with
maximum flow rates of 1.0 to 1.2 gpm.
Not Too Low Flow
BUILD
•	USE the WaterSense Product Search Tool at
www.epa.gov/watersense/product-search to
identify and specify bathroom sink faucet models
that have earned the WaterSense label.
•	INSTALL WaterSense labeled faucets and/or
faucet accessories (e.g., aerators) in all bathroom
sinks at the time of construction.
VERIFY
Faucets that flow at a rate of 0.5 gpm or less are
intended for public restrooms within commercial
buildings; they generally do not provide enough
flow to be suitable for residential bathrooms,
where activities such as shaving and face washing
require more water and demand hot water to get
to the tap quickly. Therefore, WaterSense
established a minimum flow rate for WaterSense
labeled lavatory faucets (i.e., 0.8 gpm at 20 psi).
Faucets below this flow rate do not meet EPA's
criteria for lavatory faucets and should not be
installed in WaterSense labeled homes.
As an exception, 0.5 gpm faucets may be
appropriate for shared bathrooms within
multifamily buildings, such as in the lobby, pool
house, or other common areas.
Learn More
Visit WaterSense's Bathroom Faucets
web page to learn more
(www.epa.gov/watersense/bathroom-faucets).
OBTAIN the makes and model numbers for all
bathroom sink faucets in a home. Use the
WaterSense Product Search Tool to confirm that all bathroom sink faucets are WaterSense labeled.
CHECK the gpm marking on the faucet or faucet aerator.
VERIFY that no more than 0,25 gallons (32 ounces) of water are collected over 10 seconds of
operation.
*NOTE: Consult with the Home Certification Organization for specific verification protocols.
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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