ISO 31600:2022
(Main)Water efficiency labelling programmes – Requirements with guidance for implementation
Water efficiency labelling programmes – Requirements with guidance for implementation
This document specifies requirements for a water efficiency labelling programme for plumbing products and water using appliances along with guidance for their implementation. This document applies to the following products: a) showers; b) tap (faucet) equipment; c) flow regulators (flow controllers); d) water closet (toilet) equipment; e) urinal equipment; f) dishwashers; g) clothes washing machines; h) the dryer function of combination washer/dryers, where they use water to dry a load.
Programmes d’étiquetage pour une utilisation rationnelle de l’eau - Exigences et recommandations pour la mise en œuvre
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 31600
First edition
2022-06
Water efficiency labelling programmes
– Requirements with guidance for
implementation
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms . 1
3.2 Pressure . 3
4 Water efficiency labelling programme requirements . 3
Annex A (informative) General guidance for a water efficiency labelling programme .5
Annex B (informative) Existing water efficiency labelling programmes by country or
region — Plumbing products .21
Annex C (informative) Existing water efficiency labelling programmes by country – Water
using appliances .39
Annex D (informative) Guidance on conformity assessment .46
Annex E (informative) Examples of existing water efficiency programme labels .60
Bibliography .64
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
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expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Project Committee ISO/PC 316, Water efficient products - Rating.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
The purpose of ISO 31600 is to provide a set of best practices and guidance for the preparation and
implementation of a water efficiency labelling programme for plumbing products and water using
appliances. A key focus is to provide the criteria for developing countries to establish an effective water
efficiency labelling standard that will save water resources.
This project was approved on the basis that consumer empowerment through the communication of a
product’s water efficiency is a proven way of saving both water and energy. Several countries around
the world already have well-established and effective water efficiency labelling programmes which
empower consumers to make choices favouring more water efficient fixtures and appliances without
compromising on human hygiene and sanitation. These existing labelling programmes were consulted
in the development of this document.
ISO 31600 aims to globally encourage the development of national standards for water efficiency
labelling, which will further lead to development and marketing of water efficient products, and
enable consumers to make an informed choice, positively influencing manufacturers to improve the
performance of their products through consumer demand. This document does not seek to establish
ways to use water efficiency labelling in policies or programmes. The intention is to provide an
understanding of the essential requirements for the development of an effective water efficiency
labelling programme.
This document refers to existing national standards for the determination of water consumption and
other important test procedures and requirements that form the critical underpinnings of a water
efficiency labelling programme. Countries without national standards for products may formulate
their own national standard either by adopting a national standard from a supporting country or by
preparing an indigenous standard, to meet the requirements in Clause 4.
NOTE National regulations can also apply.
This document contains five informative annexes, with Annex A providing suggested universal tests
for the determination of water consumption and Annexes B to E providing descriptions of a number
of existing schemes/programmes. Countries that do not have an existing water efficiency labelling
programme may consider these examples to select and adopt those best suited for their markets and
conditions when developing their own water efficiency labelling programme.
Application of this document presupposes awareness of water efficiency programmes and regulations
in the applicable country.
An overview of how to use this document, including the pathway to demonstrate conformance, is
provided in Figure 1.
v
Figure 1 — Pathway to ISO 31600 conformance
vi
INTERNATIONAL STANDARD ISO 31600:2022(E)
Water efficiency labelling programmes – Requirements
with guidance for implementation
1 Scope
This document specifies requirements for a water efficiency labelling programme for plumbing
products and water using appliances along with guidance for their implementation.
This document applies to the following products:
a) showers;
b) tap (faucet) equipment;
c) flow regulators (flow controllers);
d) water closet (toilet) equipment;
e) urinal equipment;
f) dishwashers;
g) clothes washing machines;
h) the dryer function of combination washer/dryers, where they use water to dry a load.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 General terms
3.1.1
water efficiency
accomplishment of a function, task, process, service or result, with the minimum amount of water
needed for the safe operation of the product
[SOURCE: ISO 24513:2019, 3.4.7, modified — At the end of the definition, "practicable" has been replaced
by "needed for the safe operation of the product".]
3.1.2
banded (tiered) labelling programme
programme that allows products to be labelled with various rated levels of water consumption
Note 1 to entry: Products can be differentiated by various visual means, e.g. stars or other markings, for
identifying incremental levels of water efficiency (3.1.1). See Annex E for examples of existing water efficiency
programme labels.
3.1.3
single threshold labelling programme
programme that requires all labelled products to meet a single water consumption requirement,
typically expressed as a maximum
Note 1 to entry: Labelled products may or may not include the product’s water efficiency (3.1.1) rating. See
Annex E for examples of existing water efficiency programme labels.
3.1.4
shower assembly
combination of a shower control (valve) complete with shower hose (flexible or rigid) and shower outlet
3.1.5
shower outlet device
device through which water is intended to pass to form spray for bathing purposes
EXAMPLE showerheads, handheld showerheads, body sprays and rain shower outlet devices
Note 1 to entry: A shower outlet device can be sold separately or as part of a shower assembly.
3.1.6
tap(s)
faucet(s)
device through which water is intended to pass with an inlet and connection, and a control (valve) for
drawing or regulating the flow of water
Note 1 to entry: A typical application for a tap (faucet) is over a basin (lavatory) (3.2.6), sink or laundry tub.
3.1.7
flow regulator
flow controller
flow control device used to control the rate of water flow in a tap (faucet) (3.1.6), shower outlet device
(3.1.5) or shower assembly (3.1.4)
Note 1 to entry: Device can be sold separately or located within (upstream of the outlet) or at the very end
(forming part of the outlet) of the water flow passage through a product.
Note 2 to entry: When sold separately, they are typically sold as part of an aerator subassembly or as a stand-
alone component intended to be installed in a shower outlet device or shower assembly solution.
3.1.8
water closet
toilet
sanitary plumbing fixture that consists typically of a water-flushed bowl connected to a drainage
system and fitted with a device for flushing water to cleanse the bowl after defecation and urination
3.1.9
urinal
sanitary plumbing fixture typically connected to a water flushing device for the reception and flushing
away of urine into a drainage system
3.1.10
pressure flush valve
flushometer valve
device that controls the release of water to flush a urinal (3.1.9) or water closet (toilet) (3.1.8)
3.2 Pressure
3.2.1
pressure
measured force behind water system delivered through a plumbing system
Note 1 to entry: The plumbing system water supply of each country will determine the amount of pressure
delivered to a water using outlet or fixture.
3.2.2
high pressure
hot-water and cold-water static supply pressures at or above a stated pressure for the country of
intended installation
Note 1 to entry: This is typically in a fully pumped plumbing system installation.
3.2.3
low pressure
hot water and cold-water static supply pressures below a stated pressure for the country of intended
installation
Note 1 to entry: This is typically in gravity fed plumbing system installations.
3.2.4
static pressure
measure of the at rest pressure in a plumbing system
3.2.5
dynamic pressure
pressure in a plumbing system under flow conditions
3.2.6
basin
lavatory
fixture for holding water for washing the hands or face, whether with one tap (faucet) (3.1.6) to allow a
single user or a number of taps (faucets) spaced to allow simultaneous users
Note 1 to entry: The term lavatory is used in some countries, but can also refer to the room in which water closets
(toilets) (3.1.8) or urinals (3.1.9) can be positioned, along with a basin for washing of hands.
4 Water efficiency labelling programme requirements
To demonstrate conformance to this document, the water efficiency labelling programme shall:
a) For the product, include or reference to (a) national standard(s);
NOTE 1 A national standard(s) provides the foundation for enablin
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