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WaterSense	WaterSense Specification for Flushing Urinals
WaterSense® Specification for Flushing Urinals
1.0 Scope and Objective
This specification establishes the criteria for a y flushing urinal under the U.S. Environmental
Protection Agency's (EPA's) WaterSense® program. It is applicable to:
•	Urinal fixtures that receive liquid waste and use water to convey the waste
through a trap seal into a gravity drainage system.
•	Pressurized flushing devices that deliver water to urinal fixtures.
•	Flush tank (gravity type) flushing devices that deliver water to urinal fixtures.
The specification is designed to ensure both sustainable, efficient water use and a high level of
user satisfaction with flushing performance.
2.0 Summary of Criteria
Urinal fixtures and flushing devices must meet criteria in the following areas, as applicable:
•	The average maximum water consumption must not exceed 0.5 gallons per flush
(gpf) (1.9 liters per flush [Lpf]), as specified in Section 3.0.
•	The urinal fixture must conform to the requirements specified in Section 4.0.
•	The urinal flushing device must conform to the applicable requirements specified
in Section 5.0.
3.0 Water-Efficiency Criteria
3.1 The average maximum water consumption shall be tested in accordance with the
following ANSI standards as applicable: ASME A112.19.2/CSA B45.1, ASME
A112.19.3/CSA B45.4, or IAPMO Z124.91, and shall meet the following criteria:
3.1.1	The manufacturer shall specify a maximum flush volume (rated flush
volume) of the flushing device or urinal fixture, which must be equal to or
less than 0.5 gpf (1.9 Lpf).
3.1.2	The average maximum flush volume, determined through testing, shall
not exceed the value specified in Section 3.1.1.
1 References to these and other ASME, IAPMO, and ASSE ANSI standards apply to the most current version of those standards.
For definitions of these acronyms see Section 9.0.
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WaterSense	WaterSense Specification for Flushing Urinals
4.0 Urinal Fixture Requirements
4.1	Ceramic urinal fixtures must conform to ASME A112.19.2/CSA B45.1
requirements when tested with a flushing device with the same rated flush
volume that meets the requirements of Sections 3.0 and 5.0 of this specification.
4.2	Stainless steel urinal fixtures must conform to ASME A112.19.3/CSA B45.4
requirements when tested with a flushing device with the same rated flush
volume that meets the requirements of Sections 3.0 and 5.0 of this specification.
4.3	Plastic urinal fixtures must conform to IAPMO Z124.9 requirements when tested
with a flushing device with the same rated flush volume that meets the
requirements of Sections 3.0 and 5.0 of this specification.
5.0 Flushing Device Requirements
5.1	Pressurized Flushing Devices
5.1.1	The pressurized flushing device must conform to ASSE #1037.
5.1.2	The pressurized flushing device must not exceed the rated flush volume
of water specified in Section 3.1.1 even if the primary actuator is
maintained in the flush position (i.e., device's primary actuator must be a
non-hold-open design).
5.1.3	The pressurized flushing device must not contain a flush volume
adjustment that allows the flush volume to vary more than ±0.1 gpf (± 0.4
Lpf) from the pressurized flushing device's rated flush volume specified in
Section 3.1.1.2 The pressurized flushing device must not be packaged,
marked, or provided with instructions directing the user to an alternative
flush volume setting that would override the rated flush volume specified
in Section 3.1.1.
5.1.4	The manufacturer must attest that the pressurized flushing device is
designed such that replaceable or maintainable parts (e.g., pistons or
diaphragms) are not intended to be interchangeable with parts that would
cause the device to exceed the rated flush volume specified in Section
3.1.1.
5.2	Flush Tank (Gravity Type) Flushing Devices
5.2.1 The flush tank (gravity type) flushing device must conform to ASME
A112.19.2/CSA B45.1.
2 A control stop that supplies water to a flushometer valve is not considered a flush volume adjustment.
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5.2.2	The flush tank (gravity type) flushing device must not exceed the rated
flush volume of water specified in Section 3.1.1, even if the primary
actuator is maintained in the flush position (i.e., the device's primary
actuator must be a non-hold open design).
5.2.3	The average maximum volume of water that may be discharged by the
tank, when field adjustment of the tank trim is set at its maximum water
use setting, must not vary more than ±0.1 gpf (± 0.4 Lpf) from the rated
flush volume specified in Section 3.1.1. The flush tank (gravity type)
flushing device must not be packaged, marked, or provided with
instructions directing the user to an alternative flush volume setting that
would override the rated flush volume specified in Section 3.1.1.
5.2.4	The manufacturer must attest that the flushing device is designed such
that replaceable or maintainable parts are not intended to be
interchangeable with parts that would cause the device to exceed the
rated flush volume specified in Section 3.1.1.
6.0 Marking
6.1	The urinal fixture and flushing device product and product packaging must be
marked with the rated flush volume in gpf and Lpf as specified by the
manufacturer in Section 3.1.1, verified through testing and in compliance with this
specification.
6.2	Marking must be in gpf and Lpf in at least two digit resolutions (e.g., 0.5 gpf [1.9
Lpf]).
7.0 Effective Date
This specification is effective on August 14, 2009.
8.0 Future Specification Revisions
EPA reserves the right to revise this specification should technological and/or market changes
affect its usefulness to consumers, industry, or the environment. Revisions to the specification
would be made following discussions with industry partners and other interested stakeholders.
9.0 Definitions
Definitions within ASMEA112.19.2/CSA B45.1, ASME A112.19.3/CSA B45.4, IAPMOZ124.9,
and ASSE #1037 are included by reference.
ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
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ASSE - American Society of Sanitary Engineering
CSA - Canadian Standards Association
IAPMO - International Association of Plumbing and Mechanical Officials
Complete system - Any combination flushing device and urinal fixture that have both been
certified for the same rated flush volume and that when used together meet the requirements of
this specification for water efficiency and performance.
Flushing device - Device employed in the operation of a urinal to deliver water into the urinal
fixture. Includes pressurized flushing devices and flush tanks (gravity type), as defined in ASME
A112.19.2/CSA B45.1.
Rated flush volume - The maximum flush volume, as specified by the manufacturer, verified
through testing and in compliance with this specification.
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Appendix A: Informative Annex for WaterSense Labeling
The following requirements must be met for products to earn the WaterSense label.
1.0 WaterSense Partnership
The manufacturer3 of the product must have a signed partnership agreement in place with EPA.
In accordance with this specification, the product can be considered as either a flushing device,
urinal fixture, or the complete system.
2.0 Conformity Assessment
Conformance to this specification must be certified by a body accredited in accordance with the
WaterSense product certification system.
3.0 Independent Labeling of Urinal Fixtures and Flushing Devices
Certified urinal fixtures and flushing devices may be labeled together as a complete system or
separately as a urinal fixture or flushing device. If labeled separately, the manufacturer of each
part should clearly indicate on product documentation that the part should be used with a
WaterSense labeled counterpart that has the same rated flush volume in order to ensure that
the complete system meets the requirements of this specification for water efficiency and
performance.
4.0 Product Sampling for Certification
In selecting products for certification, at a minimum the manufacturer shall provide three
samples of the model to be tested. At least one of the samples shall be chosen at random and
tested to the requirements contained in this specification.
3 Manufacturer, as defined in the WaterSense program guidelines, means: "Any organization that produces a product
for market that might be eligible to meet WaterSense criteria for efficiency and performance. Manufacturers may also
produce 'private label' products that are sold under the brand name of a separate organization, which is treated as a
separate partner/application from the original product manufacturer." In the case of private labeling, the private
labeling organization that ultimately brands the product for sale must have a signed WaterSense partnership
agreement in place with EPA.
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