SIST EN 18021:2025

SLOVENSKI STANDARD
01-september-2025
Sanitarne armature - Merjenje funkcionalne učinkovitosti pip in tušev
Sanitary tapware - Measurement of functional performance of taps and showers
Sanitärarmaturen - Messung der Funktionsfähigkeit von Armaturen und Brausen
Robinetterie sanitaire - Mesure des performances fonctionnelles des robinets et des
douches
Ta slovenski standard je istoveten z: EN 18021:2025
ICS:
91.140.70 Sanitarne naprave Sanitary installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 18021
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2025
EUROPÄISCHE NORM
ICS 91.140.70
English Version
Sanitary tapware - Measurement of functional
performance of taps and showers
Robinetterie sanitaire - Mesure des performances Sanitärarmaturen - Messung der Funktionsfähigkeit
fonctionnelles des robinets et des douches von Armaturen und Brausen
This European Standard was approved by CEN on 4 May 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 18021:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 8
3 Terms and definitions . 8
4 Standard use cases . 11
5 Instructions . 13
5.1 General. 13
5.2 Replacement of components . 13
6 Technical criteria . 13
6.1 General. 13
6.2 Apparatus . 15
6.3 Energy calculation . 15
6.4 Use of flow regulators. 17
7 Taps . 17
7.1 General. 17
7.2 Flow rate testing . 17
7.2.1 Principle . 17
7.2.2 Apparatus . 17
7.2.3 Procedure . 17
7.3 Functional test . 18
7.3.1 Nominal flow rate . 18
7.3.2 Water break . 18
7.3.3 Boost function . 19
7.3.4 Cold start . 20
7.3.5 Temperature break . 20
7.3.6 Pressure independency . 21
7.3.7 Sensor function . 21
7.3.8 Time flow . 22
7.3.9 Sensitivity single lever taps. 23
7.3.10 Sensitivity thermostatic mixing valves . 23
7.3.11 Fidelity . 23
7.4 Rinsing performance . 23
7.4.1 General. 23
7.4.2 Requirement . 24
8 Shower outlets . 24
8.1 General. 24
8.2 Flow rate . 24
8.2.1 Principle . 24
8.2.2 Apparatus . 25
8.2.3 Procedure . 25
8.3 Functional test . 25
8.3.1 Nominal flow rate . 25
8.3.2 Boost function . 25
8.3.3 Pressure independency . 26
8.3.4 Spray coverage. 26
8.3.5 Spray force . 29
8.3.6 Spray dripping . 31
8.3.7 Spray pattern. 31
8.4 Rinsing performance . 32
8.4.1 General . 32
8.4.2 Requirement . 32
9 Shower sets . 32
9.1 General . 32
9.2 Rinsing performance . 32
9.2.1 General . 32
9.2.2 Requirement . 32
10 Shower systems . 33
10.1 General . 33
10.2 Flow rate . 33
10.2.1 General . 33
10.2.2 Principle . 33
10.2.3 Apparatus . 33
10.2.4 Procedure . 33
10.3 Functional test . 33
10.3.1 Nominal flow rate . 33
10.3.2 Pressure independency . 33
10.3.3 Spray coverage. 34
10.3.4 Spray force . 34
10.3.5 Spray dripping . 34
10.3.6 Spray pattern. 34
10.3.7 Water break . 34
10.3.8 Boost function . 34
10.3.9 Temperature break. 34
10.3.10 Sensor function . 34
10.3.11 Time flow. 34
10.4 Rinsing performance . 35
10.4.1 General . 35
10.4.2 Requirements . 35
Annex A (informative) Water and energy saving functions and saving potentials . 36
Annex B (informative) Tolerances for market surveillance purposes . 38
Annex C (informative) Explanation of requirements for lower flow rate products . 39
Bibliography . 40

European foreword
This document (EN 18021:2025) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2026, and conflicting national standards shall
be withdrawn at the latest by January 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused
by the products covered by this document.
This document provides no information as to whether the products can be used without restriction in
any of the Member States of the EU or EFTA.
While awaiting the adoption of verifiable European criteria, existing national regulations concerning the
use and/or the characteristics of these products remain in force.
This document defines the test procedures for the calculation of energy and measurements of functional
performance for taps, shower outlets, shower sets and shower systems in order to identify energy
efficient products.
This document does not define all requirements since these will be set by future EU legislation.
1 Scope
This document acknowledges the field of application for taps, shower outlets, shower sets and shower
systems used in water supply systems with a pressure range of (0,05 to 1,0) MPa [(0,5 to 10) bar].
The tests described in this document are type tests (laboratory tests) and not quality control tests carried
out during manufacture.
This document covers:
— PN10 taps;
— PN5 shower outlets;
— PN5 shower sets;
— PN10 shower systems.
The following products are excluded from this document:
— shower taps on its own;
— taps for filling bathtubs;
— the tub filling function of combined taps;
— the function of a tap that delivers e.g. boiling water or sparkling water, etc.;
— body or side jet showers.
The conditions of use for taps and shower systems are given in Table 1. The conditions of use for showers
sets and shower outlets are given in Table 2.
Table 1 — Conditions of use for taps and shower systems
Operating range of taps and shower systems
Water supply system
Limits Recommended
dynamic pressure
≥ 0,05 MPa
b
dynamic pressure
(0,5 bar)
see Figure 1 (0,1 to 0,5) MPa
static pressure
[(1,0 to 5,0) bar]
≤ 1,0 MPa
(10,0 bar)
a
temperature ≤ 70 °C ≤ 65 °C
a
This maximum temperature limit can only be reached for short durations not greater than 1 h.
b
Measured at the point of discharge.
NOTE Taps and shower systems for use at pressures lower than those in Table 1 are not covered by this
standard.
Table 2 — Conditions of use for shower outlets and shower sets
Operating range of showers
Water supply system
Limits Recommended
dynamic pressure
≥ 0,05 MPa
dynamic pressure
(0,5 bar)
see Figure 1 (0,1 to 0,3) MPa
static pressure
[(1,0 to 3,0) bar]
≤ 0,5 MPa
(5,0 bar)
a
temperature ≤ 70 °C ≤ 42 °C
a
This maximum temperature limit can only be reached for short durations not greater than 1 h.

Key
1 cold water
2 hot water
3 mains supply pipe (supply pressures up to 10 bar)
4 water heater
Figure 1 — Supply system with a pressure range of (0,05 to 1,0) MPa [(0,5 to 10) bar]
Health and quality requirements in accordance to European and national legislation for final materials in
contact with water intended for human consumption are not covered by this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 816, Sanitary tapware — Automatic shut-off valves PN 10
EN 817, Sanitary tapware — Mechanical mixing valves (PN 10) — General technical specifications
EN 1111, Sanitary tapware — Thermostatic mixing valves (PN 10) — General technical specification
EN 1112, Sanitary tapware — Shower outlets for sanitary tapware for water supply systems of type 1 and
type 2 — General technical specification
EN 15091:2024, Sanitary tapware — Electronic opening and closing sanitary tapware
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
activity
use of sanitary tapware in respect of adjusting the control, e.g. flow, water temperature
3.2
aerator
device which is fitted at the outlet of a sanitary tapware product to influence the flow rate and stream
appearance of the water stream
Note 1 to entry: See EN 246.
3.3
electronic automatic shut off valve
sanitary tapware whose opening is operated by a non-electronic action on the control device,
and whose closure happens automatically after a period of adjustable or non-adjustable duration
Note 1 to entry: See EN 816.
3.4
non-electronic automatic shut off valve
sanitary tapware whose opening is operated by an electronic sensor recognising presence of
a user, and whose closure happens automatically when the presence is removed
Note 1 to entry: See EN 15091.
3.5
boost function
device, not part of the primary flow control, that temporarily allows an increase of flow rate by a
deliberate user action and that is automatically cancelled when the water flow is either interrupted or
the deliberate user action is stopped
Note 1 to entry: The boost function can also change the appearance of the spray without being considered as a
different mode due to the auto return function.
3.6
control device
lever, handle or other means of control on a tap by which the user starts, stops or adjusts the water flow
and/or temperature from the sanitary tapware manually
3.7
economy flow
default maximum flow rate before utilising the boost function or overriding the water break
3.8
flow regulator
device, which is fitted to or within sanitary tapware, to enable dynamic control of the delivered water
flow rate
Note 1 to entry: A flow regulating device that could be housed in a dedicated housing that could also include
isolating valves and check valves as part of the design.
3.9
hand shower
shower which is mainly held by hand or placed in a separate holder
Note 1 to entry: See EN 1112.
3.10
mechanical mixing valve
valve which mixes hot and cold water
Note 1 to entry: See EN 817.
3.11
mode selector
device, providing the possibility of selecting different water delivery modes e.g. different shower styles
on hand showers or different spray modes on a kitchen tap
3.12
shower hose
flexible hose which connects sanitary tapware to a hand shower
Note 1 to entry: See EN 1113.
3.13
shower outlet
any hand shower or fixed shower (excluding body or side jets)
Note 1 to entry: Sprays that are permanently integrated into the fitting or can be pulled out (e.g. mixer taps for
sinks and washbasins) are not considered as shower outlets.
Note 2 to entry: A fixed shower is a shower which is fixed to a wall or ceiling and should be fixed in normal use. It
is also known as head shower.
Note 3 to entry: See EN 1112.
3.14
shower set
set that consists of one or more shower outlets equipped with additional components e.g. shower hose
or shower arm
Note 1 to entry: It may also contain non-performance components as shower rail and hand shower holder.
Note 2 to entry: It does not contain a shower control (valve).
Note 3 to entry: A shower hose is a flexible hose that connects sanitary tapware to a hand shower, whereas a shower
arm is a component that supports a shower head and connects it to the mixed water from sanitary tapware.
3.15
shower system
combination of at least a shower control (valve) with shower connection(s) (flexible or rigid) and shower
outlet(s)
Note 1 to entry: It may also contain non-performance components as shower rail and hand shower holder.
Note 2 to entry: It is also known as shower solution.
3.16
spray outlet
device for culinary and ablutionary purposes which allows water to be emitted in the form of jets or water
droplets often as a secondary outlet from e.g. a kitchen tap
3.17
spray plate
device with orifices through which water passes and forms a spray of water with separate, definable jets
or water droplets
Note 1 to entry: A spray forming mechanism is a device which generates a spray by other means.
Note 2 to entry: A spray plate is also known as a faceplate.
3.18
supply pressure
incoming pressure of the hot and cold water at the tap connection
Note 1 to entry: The supply pressure can be dynamic or static.
3.19
tap
sanitary tapware designed to deliver water to the end user for various types of installation
Note 1 to entry: This can be for installations such as kitchen taps, washbasin taps, bidets, combination taps, pillar
taps, including time flow or sensor operated products etc.
Note 2 to entry: See EN 200, EN 816, EN 817, EN 1111, EN 15091.
3.20
temperature break
function that limits the available outlet temperature of a tap
Note 1 to entry: This limiting device might be fixed, or it might be possible to override this limit, by e.g. pushing a
button or applying additional force.
3.21
thermostatic mixing valve
valve, which mixes hot and cold water and automatically controls the mixed water to a user selected
temperature
Note 1 to entry: See EN 1111.
3.22
time flow
flow duration of an automatically shut off valve
3.23
water break
device that offers a default reduced flow rate that can be overridden through a deliberate action by the
user, either by applying an additional force (hard point) to the primary flow control device or via a
distinct action and still allows adjustable flow rate
4 Standard use cases
Standard use cases are grouped by the respective product and given in Table 3. These are considered for
the test definition but don’t reflect an exhaustive list of use cases.
Table 3 — Examples for use cases
Product Primary functionalities Additional functionalities Use cases
Basin tap — Delivering water without — Allowing the user to — Hand washing
impairing its hygienic, control the
organoleptic and temperature of water — Glass filling
chemical quality and at the outlet (for taps
— Teeth brushing
without affecting the of hot and cold water)
safety of users and
— Shaving
— Delivering water in an
buildings
efficient way
— Allowing the user to
— Delivering water in a
control the flow of the
suitable quantity and
delivered water
fashion to facilitate the
desired activity (e.g.
personal hygiene and
wellness applications)
without compromising
an efficient
performance
Product Primary functionalities Additional functionalities Use cases
— Genital washing
Bidet tap — Delivering water without — Allowing the user to
impairing its hygienic, control the
organoleptic and temperature of water
chemical quality and at the outlet (for taps
without affecting the of hot and cold water)
safety of users and
— Delivering water in an
buildings
efficient way
— Allowing the user to
— Delivering water in a
control the flow of the
delivered water suitable quantity and
fashion to facilitate the
desired activity (e.g.
personal hygiene and
wellness applications)
without compromising
an efficient
performance
Kitchen tap — Delivering water without — Allowing the user to — Hand washing
impairing its hygienic, control the
— Bowl filling
organoleptic and temperature of water
chemical quality and at the outlet (for taps
— Glass filling
without affecting the of hot and cold water)
safety of users and
— Food washing
— Delivering water in an
buildings
efficient way
— Dish washing
— Allowing the user to
— Delivering water in a
control the flow of the
suitable quantity and
delivered water
fashion to facilitate the
— Delivering water with desired activity (e.g.
high flow rate and high bowl filling or washing
temperature food) without
compromising an
efficient performance
Shower — Delivering water without — Delivering water in an — Skin cleaning
(shower impairing its hygienic, efficient way
systems, organoleptic and — Hair washing
— Delivering water in a
shower chemical quality and
— Relaxation
suitable quantity and
outlets or without affecting the
fashion to facilitate the
shower safety of users and
— Massage
desired activity (e.g.
sets) buildings
personal hygiene and
— Cleaning the
— Providing an effective and wellness applications)
shower
comfortable rinsing without compromising
compartment
performance an efficient
performance
5 Instructions
5.1 General
Instructions shall comply with the following aspects:
— instructions shall include product settings for parts such as sensors, taps and shower heads;
— instructions shall contain the nominal flow rate in recognized units (for example l/min);
— for products with multiple spray modes, instructions shall indicate which spray mode meets the
applicable requirements of this document.
Specific requirements for instructions are provided by product standards.
5.2 Replacement of components
The installation and maintenance instructions shall clearly indicate information for use and maintenance
and in the event of replacing components (for example a shower hose or a shower outlet), the
components shall be replaced by parts recommended by the manufacturer. Failure to do so may create a
safety hazard and/or the requirements may no longer be satisfied and/or affect the energy calculation
and/or flow rate.
6 Technical criteria
6.1 General
All measurements are carried out with all connection hoses, flow limiters or regulators, accessories,
aerators, etc. fitted to the sanitary tapware as supplied and are installed as described in the
manufacturer’s instructions.
Where the sanitary tapware has more than one outlet or mode, each outlet and mode shall be tested to
establish the flow rate at each outlet.
Descriptions and abbreviations are given in Table 4. Tolerances for the measuring equipment are
provided in Table 5.
Table 4 — Descriptions and abbreviations
Descriptions Abbreviations
Dynamic pressure of the hot water supply P
h
Dynamic pressure of the cold water supply P
c
Flow rate of hot water Q
h
Flow rate of cold water Q
c
Flow rate of mixed water Q = (Q + Q )
mix h c
Temperature of the hot water supply T
h
Temperature of the cold water supply T
c
Temperature of the mixed water (at the discharge of
T
mix
the outlet)
Temperature of mixed water (before overriding the
Tbreak
temperature break)
Run time of a non-electronic tap with shut off function t
flow
Economy flow Q
eco
Flow rate at pressure P1 Q
P1
Flow rate at pressure P2 Q
P2max
Nominal flow rate Q
nom
Flow rate in activated boost function Q
boost
Flow rate at economy flow position while repeating Qcheck
the measurement
Table 5 — Accuracy of measurement
Description Accuracy of measurement
Dynamic pressure of the water supply ±1,0 %
Flow rate of water ±2,0 %
Temperature of water ±0,5 K
Table 6 — Test pressures
Measuring conditions Pressure (applied to each inlet)
+0,02
( 0,1 ) MPa
−0
P1 (reduced pressure)
+0,02
[( 10, ) bar]
−0
+0,02
( 0,3 ) MPa
−0
P2 (standard reference pressure)
+0,2
[( 3,0 ) bar]
−0
Table 7 — Water temperatures of water supply
Temperature
Temperature of water supply
°C
T 10 to 15
c
T (T + 50) ± 1
h c
6.2 Apparatus
A test apparatus capable of delivering and maintaining the pressures given in Table 6, temperatures of
hot and cold water given in Table 7 and necessary flow rates shall be used.
The temperature T shall be measured as close as possible to the outlet.
mix
NOTE Additional information can be found in the relevant EN product standards.
6.3 Energy calculation
The energy used by an average user per year and product is calculated with Formula (1) and parameters
given in Table 8. Energy reductions shall be calculated according to Table 9.
Table 8 — Fixed parameters for energy calculation
Fixed input values Kitchen tap Basin tap Shower
Outlet temperature (T ) 45 °C 38 °C 38 °C
out
Time per event (tevent) 1 min 1 min 7 min
Events per day (X) 7 7 1
Specific heat capacity of water 4,18 kJ/(kg K)
Density of water ≈ 1 kg/l
Inlet temperature (T ) 15 °C
in
Table 9 — Energy reductions and referenced flow rates
Function Clause Water Energy
(flow rate) (calculated)
Water break 7.3.2 Q E(Q ) – energy calculation based on reduced
eco eco
flow rate
Boost function (tap) 7.3.3 Q E(Q ) – energy calculation based on reduced
eco eco
flow rate
Cold start (taps) 7.3.4 Q 0,8 × E(Q ) – energy saving of 20 %
nom nom
Temperature break 7.3.5 Q 0,8 × E(Q ) – energy saving of 20 %
nom nom
(excluding showers)
Sensor operated 7.3.7 Q 0,5 × E(Q ) – energy saving of 50 %
nom nom
(Term 3.3))
Time flow (self-closing) 7.3.8 Q 0,8 × E(Q ) – energy saving of 20 % for
nom nom
(Term 3.4)) taps, if 𝑡𝑡 ≤ 15 s
flow
0,7 × E(Q ) – energy saving of 30 % for
nom
taps, if 𝑡𝑡 ≤ 7 s
flow
0,8 × E(Q ) – energy saving of 20 % for
nom
shower systems, if 𝑡𝑡 ≤ 30 s
flow
0,75 × E(Q ) – energy saving of 25 % for
nom
shower systems, if 𝑡𝑡 ≤ 30 s and where the
flow
flow can be interrupted by start/stop button
Thermostatic (shower 7.3.10 Q E(Q ) – no energy saving
nom nom
systems)
7.3.11
Boost function (shower) 8.3.2 Q E(Q ) – energy calculation based on reduced
eco eco
flow rate
For those energy savings to apply, the energy saving features shall be tested as indicated in the standard.
Multiple energy saving features can be combined in one product. In this case, the calculated savings are
combined. As shown in the examples below:
a) cold start + water break = 0,8 × E(Q );
eco
b) cold start + temperature break = (0,8 × 0,8) × E(Q ) = 0,64 × E(Q ).
nom nom
 l   kJ  kg
Q × 4, 18 × TK− 15 × 1
( )
eco/nom    out  
kWh min kg× K l  1  day
    
E  ×tXmin×× 365 (1)

 event events  
annum kJ day annum
   
3 600

kWh

NOTE 1 E is the calculated energy consumption per annum based on the fixed parameters of Table 9.
NOTE 2 Q is taken from Table 9 and is applied as appropriate.
eco/nom
NOTE 3 The parameters “time per event” and “events per day” are based on Table 3.39 of the MEErP Preparatory
Study on Taps and Showers (2014).
=
NOTE 4 Temperatures for energy calculation can reflect the average use, but test temperatures in this document
might differ.
NOTE 5 Water and energy saving functions (Table A.1) according to studies and schemes and their potential
savings (Table A.2) are shown in Annex A.
NOTE 6 Formula (1) does not take into account the internal consumption of electrical energy of electronical
supplied products.
6.4 Use of flow regulators
Where products are supplied with one or more flow regulator ‘in the box’ then the product shall be tested
in all delivered variations.
7 Taps
7.1 General
Taps shall meet the following requirements:
— flow rate (7.2);
— rinsing performance (7.4).
7.2 Flow rate testing
7.2.1 Principle
To determine the flow rate of the tap corresponding to a standard reference pressure and a reduced
pressure (see Table 6) to ensure that products are fit for purpose when installed. The principle consists
of a method for measuring the flow rate through the outlet using water (T ≤ 30 °C) in order to determine
the flow rate, for thermostatic mixing valves use temperatures as given in Table 7.
7.2.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.2.3 Procedure
a) Connect the appropriate water connection (cold supply only, hot supply only or both cold and hot
supplies as necessary).
b) Deformable inlet supply tubes (flexible supply hoses) shall be used in an extended or straight
condition i.e. no restriction by kinking, etc.
c) Open the obturator(s) to its maximum position (activating boost function or override water break, if
fitted).
d) Apply P2 to the tap and maintain P2 throughout the test.
e) Adjust the temperature control (if fitted) to the highest flow rate and mark its position.
f) Record the maximum flow rate achieved (Q ).
P2max
g) If Q ≤ 8 l/min apply P1 to the tap and maintain P1 throughout the test.
P2max
h) Record the maximum flow rate achieved (Q ).
P1
i) Repeat the measurements a) to h) in all modes.
7.3 Functional test
7.3.1 Nominal flow rate
The nominal flow rate Q is the highest flow rate Q of all modes/outlets.
nom P2max
NOTE 1 Information on flow rate tolerances is given in Annex B.
NOTE 2 For bath filling taps with shower outlets only the shower outlet is measured for Qnom.
7.3.2 Water break
7.3.2.1 Description
This test is to measure the economy flow rate and to validate the function of the water break and to ensure
that the flow adjustment before and after the water break position is possible.

Key
X opening
Y force
a hard point
F actuating force
Figure 2 — Example of a force measurement of a water break in case of a hard point
7.3.2.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.3.2.3 Procedure
a) Connect the tap to the test apparatus in its position of use.
b) Adjust the temperature control (if fitted) to the highest flow rate and mark its position.
c) Open the flow control device to the economy flow position.
d) Apply pressure P2 and maintain it throughout the test.
e) Record the flow rate Q .
eco
f) Fully open the flow control device and measure the override force F at a distance of 10 mm from
−5
the end of flow control device (see also Figure 2) (unless an additional action is needed).
g) Record the flow rate Q .
P2max
h) Reduce the flow rate down to right before the “hard point” (or water break point).
i) Record the flow rate Q .
check
7.3.2.4 Requirements
To qualify as a water break feature, the following criteria need to be met:
(0,2 × Q ) ≤ Q
P2max eco
The recorded force shall be F ≥ 6 N (for hard point breaks).
It shall be ensured that the amount of water can be adjusted after the water brake has been overcome
(Q < Q
check P2max).
7.3.3 Boost function
7.3.3.1 Description
Measurement of the economy flow rate and validation of the boost function.
7.3.3.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.3.3.3 Procedure
a) Connect the tap to the test apparatus in its position of use.
b) Open the flow control device to the economy flow position.
c) Apply pressure P2 and adjust the temperature control (if fitted) to the highest flow rate and mark its
position.
d) Record the flow rate Q .
eco
e) Activate the boost function.
f) Record the flow rate Q
boost.
f) Close the flow control device.
g) Open the flow control device to the economy flow position.
h) Record the flow rate Q .
check
7.3.3.4 Requirements
To qualify as a boost function, the following criteria shall be met:
The boost function shall automatically return to regular flow rate after flow control is turned off.
a) Q < 1,2 Q .
check Eco
b) recorded flow rates for Q > 8 l/min shall be Q < 2 Q .
eco boost eco
7.3.4 Cold start
7.3.4.1 Description
A single lever mixer with the lever in middle position shall only deliver water from cold water supply.
Middle position is defined in line with the spout as shown in Figure 3. A displacement of up to 5° is
acceptable.
It is applicable for single lever mixers as defined in EN 817.
Combination taps (EN 200) are considered as cold start taps per its design.

Figure 3 — Definition of “middle position”
7.3.4.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.3.4.3 Procedure
a) Connect the tap only with the cold water inlet to the test apparatus.
b) Apply pressure P2 to the cold water inlet.
c) Move the lever to middle position (as shown in Figure 3).
d) Fully open the flow control device.
e) Observe the hot water inlet.
7.3.4.4 Requirements
There shall be no leakage at the hot water inlet.
7.3.5 Temperature break
7.3.5.1 Principle
To verify a maximum temperature at the temperature break.
7.3.5.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.3.5.3 Test procedure
a) Apply and maintain pressure P2 and the temperature inlet settings according to Table 7 and allow
water to flow until the outlet temperature has stabilized.
b) Adjust the temperature control to the temperature break and note T .
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c) Adjust the temperature control to fully cold and maintain the position for at least 5 s.
d) Within 3 s adjust the temperature control to the temperature break.
e) Allow water to flow for at least 30 s.
f) Note the temperature T .
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7.3.5.4 Requirements
The temperatures (T and T ) at the temperature break shall be ≤ 43 °C.
break check
7.3.6 Pressure independency
7.3.6.1 Description
This function ensures the performance of the tap on reduced pressure conditions with a nominal flow
rate of Q ≤ 8 l/min.
P2max
7.3.6.2 Apparatus
The apparatus shall be the same as described in 6.2.
7.3.6.3 Procedure
The procedure shall be the same as described in 7.2.3
7.3.6.4 Requirements
When evaluated with the results of 7.2, the flow rate shall be Q
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