SIST EN 1287:2026

SLOVENSKI STANDARD
01-junij-2026
Sanitarne armature - Nizkotlačni termostatski mešalni ventili - Splošne tehnične
zahteve
Sanitary tapware - Low pressure thermostatic mixing valves - General technical
specification
Sanitärarmaturen - Thermostatische Mischer für die Anwendung im Niederdruckbereich -
Allgemeine technische Spezifikation
Robinetterie sanitaire - Mitigeurs thermostatiques basse pression - Spécifications
techniques générales
Ta slovenski standard je istoveten z: EN 1287:2026
ICS:
91.140.70 Sanitarne naprave Sanitary installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1287
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 91.140.70 Supersedes EN 1287:2017
English Version
Sanitary tapware - Low pressure thermostatic mixing
valves - General technical specification
Robinetterie sanitaire - Mitigeurs thermostatiques Sanitärarmaturen - Thermostatische Mischer für die
basse pression - Spécifications techniques générales Anwendung im Niederdruckbereich - Allgemeine
technische Spezifikation
This European Standard was approved by CEN on 16 February 2026.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1287:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Symbols and units . 9
5 Classification. 10
6 Designation . 10
7 Marking/identification . 11
7.1 Marking . 11
7.2 Identification . 11
8 Materials . 11
8.1 Chemical and hygiene requirements . 11
8.2 Exposed surface condition and quality of coating . 11
9 Dimensional characteristics . 11
9.1 General remarks . 11
9.2 Inlet dimensions . 12
9.3 Outlet dimensions . 14
9.4 Mounting dimensions . 16
9.5 Special cases . 19
9.6 Flexible hoses for outlet 2 . 19
9.7 Outlet 2 . 19
10 Backflow protection . 19
11 Test sequence . 20
12 Leaktightness . 20
12.1 General. 20
12.1.1 Principle . 20
12.1.2 Apparatus . 20
12.2 Leaktightness of the obturator and upstream thereof . 20
12.2.1 General. 20
12.2.2 Procedure . 20
12.2.3 Requirements . 20
12.3 Cross-flow between inlets . 21
12.3.1 General. 21
12.3.2 Procedure . 21
12.3.3 Requirements . 21
12.4 Leaktightness downstream of the obturator . 21
12.4.1 General. 21
12.4.2 Procedure . 21
12.4.3 Requirements . 21
12.5 Leaktightness of manually operated diverter . 21
12.5.1 Procedure . 21
12.5.2 Requirement . 22
12.6 Leaktightness of diverter with automatic return . 22
12.6.1 Procedure . 22
12.6.2 Requirement . 22
13 Performance . 22
13.1 General . 22
13.1.1 Initial settings . 22
13.1.2 Apparatus . 23
13.1.3 Procedure . 23
13.2 Determination of flow rate . 24
13.2.1 Principle . 24
13.2.2 Procedure . 24
13.2.3 Evaluation of the results . 24
13.2.4 Requirements . 25
13.3 Sensitivity . 25
13.3.1 General . 25
13.3.2 Principle . 25
13.3.3 Procedure . 25
13.3.4 Evaluation of results . 25
13.3.5 Requirements . 26
13.4 Fidelity . 27
13.4.1 General . 27
13.4.2 Principle . 27
13.4.3 Procedure . 27
13.4.4 Evaluation of results . 27
13.4.5 Requirements . 27
13.5 Temperature stability . 28
13.5.1 Temperature control operation . 28
13.5.2 Flow rate reduction. 29
13.5.3 Cold supply failure and restoration . 30
13.5.4 Supply pressure variation . 31
13.5.5 Supply temperature variation . 32
13.5.6 Temperature override stops . 33
14 Pressure resistance. 34
14.1 General . 34
14.2 Apparatus . 34
14.3 Testing of mechanical performance of the thermostatic mixing valve upstream of the
obturator in the closed position . 34
14.3.1 Procedure . 34
14.3.2 Requirement . 34
14.4 Mechanical behaviour downstream of the obturator – Obturator in the open position . 35
14.4.1 Procedure . 35
14.4.2 Requirement . 35
15 Torsional resistance of the operating controls. 35
15.1 Principle . 35
15.2 Test method . 35
15.2.1 Principle . 35
15.2.2 Apparatus . 35
15.2.3 Procedure . 35
15.2.4 Requirements . 36
16 Mechanical endurance characteristics . 36
16.1 General. 36
16.2 Endurance test for single sequential control device . 36
16.2.1 Principle . 36
16.2.2 Apparatus . 36
16.2.3 Procedure . 36
16.2.4 Requirement . 37
16.3 Endurance test for on/off flow control device operated by rotating the control
handle . 37
16.3.1 Principle . 37
16.3.2 General. 37
16.4 Endurance test for on/off flow control device, combined with diverter mechanism . 37
16.4.1 Principle . 37
16.4.2 Apparatus . 37
16.4.3 Procedure . 37
16.4.4 Requirement . 38
16.5 Endurance test for other on-off flow control device . 38
16.5.1 Principle . 38
16.5.2 Apparatus . 38
16.5.3 Procedure . 38
16.5.4 Requirement . 39
16.6 Mechanical endurance of diverters of thermostatic mixing valves . 39
16.6.1 General. 39
16.6.2 Test method . 39
16.6.3 Requirements . 40
16.7 Mechanical endurance of swivel of spouts . 40
16.7.1 General. 40
16.7.2 Test method . 40
16.7.3 Requirements . 41
16.8 Thermal element . 41
16.8.1 Principle . 41
16.8.2 Temperature adjustable valves, (Type 1, 2, 4) . 41
16.8.3 Temperature set valves (Type 5) . 42
16.8.4 Other valves with special control devices (Type 6) . 43
Annex A (normative) Test set-up descriptions . 44
Annex B (informative) Measurements . 50
Annex C (informative) Temperature transit . 53
Annex D (normative) Hydraulic resistance for low pressure diverters with automatic return . 55
Bibliography . 57
European foreword
This document (EN 1287:2026) 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 October 2026, and conflicting national standards shall
be withdrawn at the latest by October 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 supersedes EN 1287:2017.
— Clause 13: clarifications of the requirements with new Figures being introduced.
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 product covered by this document, it provides no information as to whether the product can be
used without restriction in any of the Member state of the EU or EFTA.
NOTE While awaiting the adoption of verifiable European criteria, attention is also drawn to national
regulations that can apply.
1 Scope
This document specifies general construction, performance and material requirements for PN 10
thermostatic mixing valves (TMV) and includes test methods for the verification of mixed water
temperature performance at the point of use below 45 °C. This does not exclude the selection of higher
temperatures where available. When these devices are used to provide anti-scald protection for
children, elderly and disabled persons the mixed water temperature shall be set at a suitable
temperature (body temperature – 38 °C). In particular children are at risk to scalding at lower
temperatures than adults. This does not obviate the need for supervision of young children.
It applies to valves intended for use on sanitary appliances in kitchens, washrooms (incl. all rooms with
sanitary tapware, e.g. toilet and cloakrooms) and bathrooms operating under the conditions specified in
Table 1.
This document allows TMVs to supply a single outlet or a small number of outlets in a “domestic”
application (e.g. one valve, controlling a shower, bath, basin and/or, bidet), excluding valves specifically
designed for supplying a large number of outlets (i.e. for institutional use).
The tests described are type tests (laboratory tests) and not quality control tests carried out during
manufacture.
Table 1 — Conditions of use
a
Supply Operating range
limits recommended
Pressure
Static ≤ 1 MPa [≤10 bar]
Dynamic ≥ 0,01 MPa [≥0,1 bar] (0,02 to 0,1) MPa
[(0,2 to 1,0) bar]
Temperature
Hot ≤ 70 °C ≤ 65 °C
Cold ≤ 25 °C
NOTE Low pressure thermostatic mixing valves are designed to provide sufficient mechanical strength for
operation at 1 MPa (10 bar) static pressure.
a
For low pressure thermostatic mixing valves complying with this table there are no acoustical requirements.
Low pressure thermostatic mixing valves complying with this document can also be used with inlet supply
pressures in the range from 0,1 MPa to 0,2 MPa (1,0 bar to 2,0 bar) on condition that acoustical performance
is not a requirement of the installation.
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 200, Sanitary tapware — Single taps and combination taps for water supply systems of type 1 and
type 2 — General technical specification
EN 246, Sanitary tapware — General specifications for aerators
EN 248, Sanitary tapware — General specification for electrodeposited coatings of Ni-Cr
EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and
heating applications
EN 1112, Sanitary tapware — Shower outlets for sanitary tapware for water supply systems of type 1 and
type 2 — General technical specification
EN 1113, Sanitary tapware — Shower hoses for sanitary tapware for water supply systems of type 1 and
type 2 — General technical specification
EN 1717, Protection against pollution of water intended for human consumption in potable water
installations and general requirements for devices to prevent pollution by backflow
EN 13618, Flexible hose assemblies in drinking water installations — Functional requirements and test
methods
EN 13959, Anti-pollution check valves — DN 6 to DN 250 inclusive family E, type A, B, C and D
EN 14506, Devices to prevent pollution by backflow of potable water — Automatic diverter — Family H,
type C
EN 16145, Sanitary tapware — Extractable outlets for sink and basin mixers — General technical
specification
EN 60584 (all parts), Thermocouples (IEC 60584)
EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation (ISO 228-1)
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
thermostatic mixing valve
TMV
valve, with one or more outlets, which mixes hot and cold water and automatically controls the mixed
water to a selected temperature
3.2
fidelity
reproducibility and accuracy of temperature selection
3.3
obturator
movable component of the valve whose position in the fluid flow path permits, restricts or obstructs the
fluid flow
Note 1 to entry: The flow rate between no flow and maximum flow conditions can be affected either by the same
control device or a separate flow control device, where fitted.
3.4
outlet 1
default position of the diverter
3.5
outlet 2
outlet(s) other than outlet 1
4 Symbols and units
For the purposes of this document, the symbols and units given in Table 2 apply.
Table 2 — Symbols and units
Symbol Characteristic Unit
D internal diameter of tube or casing mm
f thickness of the annular slit of Type C pressure take-off tees mm
i width of the annular slit of Type C pressure take-off tees mm
ϑ temperature peak to peak °C
PP
p pressure of cold water supply MPa (bar)
c
p pressure of hot water supply MPa (bar)
h
Q flow rate of cold water l/s (l/min)
c
Q flow rate of hot water l/s (l/min)
h
Q + Q flow rate of mixed water l/s (l/min)
c h
t time in s s
0, 1, 2, 3.
T temperature of cold water supply °C
c
T temperature of hot water supply °C
h
T temperature of mixed water °C
m
T Temperature in °C °C
0, 1, 2, 3…
x distance mm
x distance mm
ϑ set temperature °C
ϑ mixed water temperature °C
mix
5 Classification
The classification covers the following types of TMVs:
a) Type 1 – Single control: valves with a single control device regulating flow and temperature;
(actuator movement in two planes);
b) Type 2 – Dual control: valves with separate control devices regulating flow and temperature;
c) Type 3 – Single sequential control: valves with a single control operating through a predetermined
sequence of flow and temperature. These shall have a shut-off device; (actuator movement in one
plane);
d) Type 4 – TMVs without flow control device;
e) Type 5 – Pre-set: valves not adjustable by the user of a sanitary appliance;
f) Type 6 – Other: valves with special control devices.
6 Designation
TMVs covered by this document are designated as follows:
a) its nominal inlet size, with or without diverter (see Table 3);
b) type of body (see Table 3);
c) type of outlet (see Table 3);
d) the sanitary appliance on which it shall be used (Table 3);
e) the method of mounting (see Table 3);
f) the reference to this document (EN 1287).
EXAMPLE TMV 1/2 with diverter, visible body, fixed nozzle outlet bath/shower, horizontal mounting,
EN 1287.
Table 3 — Designation
Type of tap TMV with or without diverter and
type of diverter (if applicable)
Type of body Single or multi-hole, exposed, or
concealed
Type of outlet Fixed, moveable, divided outlet
spout, with or without flow rate
regulator
Intended use Basin, bidet, sink, bath or shower
Mounting method Horizontal or vertical surfaces
Reference to this document EN 1287
7 Marking/identification
7.1 Marking
TMVs shall be permanently and legibly marked with:
— the manufacturer’s or agent’s name or identification on the body or handle.
For water saving mixing valves, appropriate information to installers and users shall be provided.
7.2 Identification
The temperature control device for the valve shall be identified by means of a scale or symbols or
colours or any combination thereof.
TMVs shall be legibly marked to indicate cold/hot inlets.
NOTE Exposed valves need only one identification of cold or hot inlet.
8 Materials
8.1 Chemical and hygiene requirements
All materials coming into contact with water intended for human consumption shall present no health
risk nor cause any change of the drinking water in terms of quality, appearances, smell or taste.
8.2 Exposed surface condition and quality of coating
Visible chromium plated surfaces and Ni-Cr coatings shall comply with the requirements of EN 248.
9 Dimensional characteristics
9.1 General remarks
The design and construction of components without defined dimensions permits various design
solutions to be adopted by the manufacturer.
Special cases are covered in 9.5.
9.2 Inlet dimensions
Inlet dimensions shall be as specified in Table 4, Figure 1, Figure 2 and Figure 3.
Table 4 — Inlet dimensions (Single- and multi-hole combination TMVs)
Dimensions Comments
mm
Shank, Union, Captive nut
A G 1/2 B In accordance with EN ISO 228-1
(When the no-go gauge fits, the thread form
Shank, Union
should be considered acceptable as long as the
A 1 G 3/4 B
function of the threaded joint can be verified.)
A 2 ≥ 9 Captive nut
Useful thread length
Shank, Union
A 3 ≥ 15
(straight or eccentric)
Connecting centres
a
G (150 ± 1) Supply connection, Straight unions
2 – hole wall mounted
with eccentric unions (extension of this range
G 1 (140 to 160)
is permitted)
a
G (150 ± 1)
Multi-hole
G 2 (200 ± 3,5)
combination TMV
G 3 (180 ± 5)
Inlet connections
N 1 (12,3 + 0,2)
Type A size 1/2
N 2 ≥ 5
N 1 (15,2 ± 0,05)
Type B size 1/2
30° chamfer/flat 0,3
N 2 ≥ 13
N 1 (14,7 + 0,3) Type C size 1/2
N 2 6,4
N 1 (19,9 + 0,3)
Type C size 3/4
N 2 ≥ 6,4
⌀ 10 , 12 , 15 , G 1/2 Plain end, male or
T Copper tube(s) or flexible hose(s)
or G 3/8 female
Tube(s) or flexible hose(s)
U ≥ 350
Flexible hoses in accordance with EN 13618
a
Other dimensions are permissible (for replacement) when market tradition requires it, provided the
manufacturer specifies the actual dimension in literature to avoid confusion with the standard dimension –
which can be achieved using an eccentric connection.
Key
1 flexible hose
2 plain tube
Figure 1 — Inlet dimensions - Single-hole taps

Figure 2 — Multi-hole combination taps
Type A Type B Type C
Figure 3 — Supply connections for taps and remote outlets
9.3 Outlet dimensions
Outlet dimensions shall be as specified in Table 5, Figure 4, Figure 5, Figure 6.
When nozzle outlets are used with flow rate regulators conforming with EN 246, the manufacturing
tolerances chosen for the connecting threads of the outlets shall be compatible with those of the
connecting threads of the flow rate regulators, in order to ensure interchangeability.
Table 5 — Outlet dimensions (remote outlets, single- and multi-hole combination TMVs)
a
Dimensions Comments
mm
Outlet orifice
Dimension from lowest point of the outlet
— lowest point
E ≥ 25 orifice including any aerator or flow
b
straightener, to the mounting surface.
— all TMVs and outlets
Horizontal mounted
D 1 ≥ 90 /
combination TMV
Wall mounted
combination TMV
D 3 ≥ 115 /
Separate spout
A G 1/2 B In accordance with EN ISO 228-1
(When the no-go gauge fits, the thread form
Remote outlet
should be considered acceptable as long as the
A 1 G 3/4 B
function of the threaded joint can be verified.)
A 4 ≥ 7,5 Useful thread length
Outlet 2
A 5 ≥ 9,5 Free length of connection
NOTE Nozzle outlets which are not in accordance with EN 246 are covered by 9.5.
a
Nozzle outlets to accept aerator shall be in accordance with EN 246.
b
Regulations exist in some EU Member States that set dimensions greater than those indicated in this
document.
Figure 4 — Remote outlet
Figure 5 — Single hole combination or remote outlet

Figure 6 — Bath shower combination or remote outlet
9.4 Mounting dimensions
Mounting dimensions shall be as specified in Table 6, Figure 7, Figure 8 and Figure 9.
Table 6 — Mounting dimensions (Single- and multi-hole TMVs)
Dimensions Comments
mm
Shank diameter
H 1 ≥ 24 2-hole TMVs size 1/2 Fixed centres
H 2 ≥ 29 separate outlet, side spray, 3 hole TMV size 1/2 Adjustable centres
Single hole TMV, 2-hole TMV size 1/2 or 3/4
H 3 ≥ 33,5
3-hole TMV size 1/2
Base or flange
J 1 ≥ 50 2-hole TMV size 3/4
Dimension of base or flange
Bath, Bath/Shower, Basin, Bidet, Sink TMV size
J 2 ≥ 45
1/2
J 3 ≥ 50 Single and multi-hole TMV Diameter of clamping washer
V ≥ 32 Basin, Bidet, Sink
V 1 ≥ 35 Bath – Two hole TMV Flange projection to rear
V 3 ≥ 47 3-hole TMV
Minimum range (mm) of
Dimension which allows TMVs and outlets to be fitted on to
L supports, which allows the
supports of thickness between 1 mm and 18 mm
installation of the TMV
Key
1 basin, bidet, sink
2 remote spray attachment
Figure 7 — Single hole TMV
Figure 8 — Two hole TMV (fixed centres)
Figure 9 — Three hole TMV (adjustable centres)
9.5 Special cases
TMVs intended for special applications, e.g. for installation on sanitary appliances not conforming with
European Standards, or where dimensional interchangeability is not a requirement can incorporate
dimensional deviations provided that:
a) all other requirements of this document are satisfied;
b) secure fixing to the mounting surface is provided with all fixing holes covered;
c) thread connections to the supply pipes comply with EN ISO 228-1;
d) the air gap dimension E ≥ 25 mm or a backflow prevention device is provided in accordance with
EN 1717;
e) the D1/D3 dimension shall be coordinated with the appropriate sanitary appliance.
The manufacturer’s literature including the installation instructions supplied with the TMV shall
indicate clearly that the TMV is for special applications.
9.6 Flexible hoses for outlet 2
Connecting dimensions for flexible hoses for outlet 2 shall be as specified in EN 1113.
9.7 Outlet 2
Connecting dimensions for outlet 2 shall be as specified in EN 1112.
10 Backflow protection
Backflow protection shall be provided using appropriate devices referenced in EN 1717.
NOTE Appropriate devices can include the use of an air gap or the specific product design.
In the case of a diverter with automatic return being considered to provide backflow prevention, it shall
comply with the requirements of EN 14506.
When check valves are used, they shall comply with EN 13959.In the case of sanitary tapware with
extractable outlets, backflow prevention shall be in compliance with EN 16145.
11 Test sequence
Table 7 — Test sequence
Sequence Sample 1 Sample 2 Sample 3
1 dimensions (Clause 9) — leaktightness (Clause 12)
2 performance torsion resistance of operating —
(Clause 13) control (Clause 15)
3 endurance for the — endurance (Clause 16 with
thermostatic element the exception 16.8)
(16.8)
4 leaktightness (12.2, leaktightness (12.2) leaktightness (Clause 12)
12.3)
5 safety (13.5.3) pressure resistance —
(Clause 14)
temperature override
stop (13.5.6)
12 Leaktightness
12.1 General
12.1.1 Principle
To verify as applicable and under cold water pressure the leaktightness of the valve see subclauses 12.2
to 12.6.
12.1.2 Apparatus
A hydraulic test circuit maintaining the pressures required throughout the duration of the test.
12.2 Leaktightness of the obturator and upstream thereof
12.2.1 General
The outlet of TMVs without flow control (Type 4, Clause 5) shall be plugged.
In the case of a single sequential TMV (Type 3, Clause 5) the flow control shall be left in the closed
position.
12.2.2 Procedure
a) Connect both inlets of the valve to the test circuit;
b) with the outlet open and the flow control closed, apply a water pressure of (1,6 ± 0,05) MPa
[(16 ± 0,5) bar] to the TMVs for (60 ± 5) s and adjust its temperature control over the full range.
12.2.3 Requirements
There shall be no leakage.
12.3 Cross-flow between inlets
12.3.1 General
The outlet of TMVs without flow control (Type 4, Clause 5) shall be plugged.
In case of a single sequential TMV (Type 3, Clause 5) the flow control shall be left in the flow closed
position.
12.3.2 Procedure
a) Connect the cold inlet of the TMV to the test circuit ;
b) with the outlet open and the flow control closed, apply a water pressure of (0,4 ± 0,02) MPa
[(4 ± 0,2) bar] to the thermostatic mixing valve for (60 ± 5) s and adjust its temperature control
over the full range ;
c) disconnect the inlet and repeat the test with the hot inlet connected.
12.3.3 Requirements
There shall be no leakage at the end of the unconnected inlet nor at the outlet. The valve shall
subsequently be subjected to 12.4. Check valves if used shall comply with EN 13959.
12.4 Leaktightness downstream of the obturator
12.4.1 General
Not applicable if the outlet cannot not artificial closed.
12.4.2 Procedure
a) Connect all inlets of the sanitary tapware to the test circuit in its position of use;
b) allow water to flow to purge air from the system and close the obturator;
c) artificially close the outlet orifice and open the obturator;
d) apply to the inlet of the TMV a water pr
...