FprEN 1287

Sanitary tapware - Low pressure thermostatic mixing valves - General technical specification

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

Sanitärarmaturen - Thermostatische Mischer für die Anwendung im Niederdruckbereich - Allgemeine technische Spezifikation

Dieses Dokument legt allgemeine Anforderungen an Konstruktion (Ausführung), Verhalten (Funktion) und an Werkstoffe für thermostatische Mischer, PN10, (Mischer) für den Niederdruckbereich fest und enthält Prüfver
fahren für die Verifizierung des Verhaltens der Mischwassertemperatur an der Entnahmestelle unter 45°C. Das schließt die Auswahl höherer Temperaturen nicht aus, sofern sie verfügbar sind. Werden diese Vorrichtungen für die Bereitstellung des Verbrühungsschutzes für Kinder, ältere und behinderte Personen eingesetzt, muss die Mischwassertemperatur auf eine geeignete Badetemperatur (Körpertemperatur– 38°C) eingestellt
den. Insbesondere bei Kindern besteht die Gefahr, sich bereits bei niedrigeren Temperaturen als Erwachsene zu verbrühen. Das macht jedoch nicht die Beaufsichtigung von Kleinkindern überflüssig.
Diese Norm gilt für Mischer für die Ausrüstung von Sanitärausstattungsgegenständen, die in Küchen, Wasch
räumen (einschließlich aller Räume mit Sanitärarmaturen, z.B. Toiletten) und Bädern installiert werden, die unter den in Tabelle1 festgelegten Bedingungen eingesetzt werden.
Dieses Dokument behandelt die Verwendung von Mischern, die in Anlagen mit nur einer oder wenigen Entnah
mestellen im häuslichen Bereich verwendet werden (z.B. ein Mischer für Brause, Badewanne, Waschbecken und/oder Sitzwaschbecken). Ausgeschlossen sind jedoch Mischer, die speziell für die Versorgung einer großen Anzahl von Entnahmestellen ausgelegt sind (d.h. für die Verwendung in Reihenwaschanlagen).
Die beschriebenen Prüfungen sind Typprüfungen (Laborprüfungen) und nicht als Prüfungen zur Qualitätskon
trolle während der Herstellung vorgesehen.
Tabelle 1 - Anwendungsbedingungen

Robinetterie sanitaire - Mitigeurs thermostatiques basse pression - Spécifications techniques générales

Le présent document spécifie des exigences générales relatives à la construction, aux performances et aux matériaux applicables aux mitigeurs thermostatiques PN 10 et comprend des méthodes d’essai permettant de vérifier les performances en température d’eau mitigée au point d’utilisation inférieur à 45 °C. Ces méthodes n’excluent pas la sélection de températures supérieures, si elles sont disponibles. Lorsque ces dispositifs sont utilisés pour assurer une protection contre les brûlures pour les enfants, les personnes âgées et les personnes présentant un handicap, la température de l’eau mitigée doit être réglée à une température de baignade appropriée (température du corps : 38 °C), car les enfants sont exposés à un risque de brûlure à des températures plus basses que les adultes. Cela ne dispense pas de surveiller les enfants en bas âge pendant le bain.
La présente norme s’applique aux mitigeurs destinés à l’équipement des appareils sanitaires installés dans les cuisines, les locaux d’hygiène corporelle (y compris tous les locaux équipés de robinetteries sanitaires, par exemple les toilettes et les vestiaires) et les salles de bains, et utilisés dans les conditions spécifiées dans le Tableau 1.
Le présent document traite des mitigeurs thermostatiques avec une seule sortie ou un petit nombre de points de puisage, qui sont destinés à une utilisation « domestique » (par exemple, un mitigeur alimentant une douche, un bain, un lavabo et/ou un bidet). Sont exclus les mitigeurs spécialement conçus pour alimenter un grand nombre de sorties (par exemple, pour une utilisation dans une collectivité).
Les essais décrits ci-après sont des essais de type (essais en laboratoire) et non des essais de contrôle qualité effectués en cours de fabrication.

Sanitarne armature - Nizkotlačni termostatski mešalni ventili - Splošne tehnične zahteve

General Information

• Status: Not Published
• Publication Date: 11-Mar-2026
• ICS: 91.140.70 - Sanitary installations
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 8 - Sanitary tapware
• Current Stage: 5020 - Submission to Vote - Formal Approval
• Start Date: 20-Nov-2025
• Due Date: 12-Dec-2024
• Completion Date: 20-Nov-2025
• Ref Project: kSIST FprEN 1287:2025 - Sanitary tapware - Low pressure thermostatic mixing valves - General technical specification

Relations

• Revises: EN 1287:2017 - Sanitary tapware - Low pressure thermostatic mixing valves - General technical specification
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 1287:2024
01-julij-2024
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: prEN 1287
ICS:
91.140.70 Sanitarne naprave Sanitary installations
oSIST prEN 1287:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 1287:2024
oSIST prEN 1287:2024
DRAFT
EUROPEAN STANDARD
prEN 1287
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2024
ICS 91.140.70 Will supersede 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1287:2024 E
worldwide for CEN national Members.

oSIST prEN 1287:2024
prEN 1287:2024 (E)
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Symbols and units . 10
5 Classification . 11
6 Designation. 11
7 Marking/identification . 12
7.1 Marking . 12
7.2 Identification . 12
8 Materials . 12
8.1 Chemical and hygiene requirements . 12
8.2 Exposed surface condition and quality of coating . 12
9 Dimensional characteristics. 12
9.1 General remarks . 12
9.2 Inlet dimensions . 12
9.3 Outlet dimensions . 15
9.4 Mounting dimensions . 17
9.5 Special cases . 20
9.6 Flexible hoses for outlet 2 . 20
9.7 Outlet 2 . 20
10 Backflow protection . 20
11 Test sequence . 21
12 Leaktightness . 21
12.1 General . 21
12.1.1 Principle . 21
12.1.2 Apparatus . 21
12.2 Leaktightness of the obturator and upstream . 21
12.2.1 General . 21
12.2.2 Procedure. 21
12.2.3 Requirements . 21
12.3 Cross-flow between inlets . 22
12.3.1 General . 22
12.3.2 Procedure. 22
12.3.3 Requirements . 22
12.4 Leaktightness downstream of the obturator . 22
12.4.1 Procedure. 22
12.4.2 Requirements . 22
12.5 Leaktightness of manually operated diverter . 22
12.5.1 Procedure. 22
12.5.2 Requirement . 23
oSIST prEN 1287:2024
prEN 1287:2024 (E)
12.6 Leaktightness of diverter with automatic return . 23
12.6.1 Procedure . 23
12.6.2 Requirement . 23
13 Performance . 23
13.1 General . 23
13.1.1 Initial settings . 23
13.1.2 Apparatus . 24
13.1.3 Procedure . 24
13.2 Determination of flow rate . 25
13.2.1 Principle . 25
13.2.2 Procedure . 25
13.2.3 Evaluation of the results . 25
13.2.4 Requirements . 25
13.3 Sensitivity . 26
13.3.1 General . 26
13.3.2 Principle . 26
13.3.3 Procedure . 26
13.3.4 Evaluation of results . 26
13.3.5 Requirements . 27
13.4 Fidelity . 28
13.4.1 General . 28
13.4.2 Principle . 28
13.4.3 Procedure . 28
13.4.4 Evaluation of results . 28
13.4.5 Requirements . 28
13.5 Temperature stability . 29
13.5.1 Temperature control operation . 29
13.5.2 Flow rate reduction . 30
13.5.3 Cold supply failure and restoration . 31
13.5.4 Supply pressure variation . 32
13.5.5 Supply temperature variation . 33
13.5.6 Temperature override stops . 34
14 Pressure resistance . 35
14.1 General . 35
14.2 Apparatus . 35
14.3 Testing of mechanical performance of the thermostatic mixing valve upstream of the
obturator in the closed position . 35
14.3.1 Procedure . 35
14.3.2 Requirement . 35
14.4 Mechanical behaviour downstream of the obturator – Obturator in the open position . 35
14.4.1 Procedure . 35
14.4.2 Requirement . 36
15 Torsional resistance of the operating controls . 36
15.1 General . 36
15.2 Test method . 36
15.2.1 Principle . 36
15.2.2 Apparatus . 36
15.2.3 Procedure . 36
15.2.4 Requirements . 37
16 Mechanical endurance characteristics . 37
16.1 General . 37
oSIST prEN 1287:2024
prEN 1287:2024 (E)
16.2 Endurance test for single sequential control device . 37
16.2.1 Principle . 37
16.2.2 Apparatus . 37
16.2.3 Procedure. 37
16.2.4 Requirement . 38
16.3 Endurance test for on/off flow control device operated by rotating the control
handle . 38
16.3.1 Principle . 38
16.3.2 General . 38
16.4 Endurance test for on/off flow control device, combined with diverter mechanism . 38
16.4.1 Principle . 38
16.4.2 Apparatus . 38
16.4.3 Procedure. 38
16.4.4 Requirement . 39
16.5 Endurance test for other on-off flow control device . 39
16.5.1 Principle . 39
16.5.2 Apparatus . 39
16.5.3 Procedure. 39
16.5.4 Requirement . 40
16.6 Mechanical endurance of diverters of thermostatic mixing valves . 40
16.6.1 General . 40
16.6.2 Test method . 40
16.6.3 Requirements . 41
16.7 Mechanical endurance of swivel of spouts . 41
16.7.1 General . 41
16.7.2 Test method . 41
16.7.3 Requirements . 42
16.8 Thermal element . 42
16.8.1 Principle . 42
16.8.2 Temperature adjustable valves, (Type 1, 2, 4) . 42
16.8.3 Temperature set valves (Type 5) . 43
16.8.4 Other valves with special control devices (Type 6) . 44
Annex A (normative) Test set-up descriptions. 45
A.1 General . 45
A.2 Inlet pipework . 45
A.2.1 Thermostat endurance. 45
A.2.2 Performance . 46
A.3 Outlet pipework . 46
A.3.1 General . 46
A.3.2 Outlet for valves except without integral atmospheric discharge spouts . 46
Annex B (informative) Measurements. 50
B.1 Pressure . 50
B.2 Flow . 50
B.3 Temperature . 50
B.3.1 Mounting . 50
B.3.2 Accuracy . 50
oSIST prEN 1287:2024
prEN 1287:2024 (E)
B.3.3 Response time . 50
B.4 Angular position . 50
B.5 Duration of transients . 50
Annex C (informative) Temperature transit . 53
C.1 Positive temperature transient . 53
C.2 Negative temperature transient . 54
Annex D (normative) Hydraulic resistance for low pressure diverters with automatic return . 55
Bibliography . 57

oSIST prEN 1287:2024
prEN 1287:2024 (E)
European foreword
This document (prEN 1287:2024) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1287:2017.
prEN 1287:2024 includes the following significant technical changes with respect to EN 1287:2017:
a) the introduction of Clause 10 on backflow protection;
b) the introduction of Clause 11 on test sequence;
c) the introduction of Clause 13 on performance;
d) the update of clauses on pressure resistance, torsional resistance and mechanical resistance;
e) new Annexes A, B, C and D.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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 needs to be set at a suitable
bathing temperature (body temperature – 38 °C) as children are at risk to scalding at lower
temperatures than adults. This does not obviate the need for supervision of young children during
bathing.
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
Pressure limits recommended
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 ≤ 90 °C (55 to 65) °C
Cold ≤ 25 °C (5 to 20) °C
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 may 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.
NOTE Low pressure thermostatic mixing valves are designed to provide sufficient mechanical
strength for operation at 1 MPa (10 bar) static pressure.
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
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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 potable water in water installations and general requirements of
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)
EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1)
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
reproduceability 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
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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 when equilibrium is disturbed s
t time when ϑ = ϑ + ϑ s
1 mix 0 x
t = t +1 s s
2 1
t = 5 s s
T temperature of cold water supply °C
c
T temperature of hot water supply °C
h
T temperature of mixed water °C
m
x distance mm
x distance mm
ϑ set temperature °C
ϑ temperature amplitude °C
x
ϑ cold water temperature (Outlet temperature) °C
c
ϑ hot water temperature (Outlet temperature) °C
h
ϑ mixed water temperature °C
mix
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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) its acoustic group and flow rate classes (Clause 13);
g) the reference to this document (prEN 1287).
EXAMPLE TMV 1/2 with diverter, visible body, fixed nozzle outlet bath/shower, horizontal mounting,
EN 1287.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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.
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.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
Table 4 — Inlet dimensions (Single- and multi-hole combination taps)
Inlet dimensions Comments
Shank, Union, Captive nut
A G 1/2 B
Shank, Union In accordance with EN ISO 228-1
A 1 G 3/4 B
A 2 9 mm min Captive nut
Useful thread length
Shank, Union (straight or
A 3 15 mm min
eccentric)
Connecting centres
(150 ± 1)
a
G Supply connection, Straight unions
mm
2 – hole wall mounted
(140 to 160) with eccentric unions (extension of
G 1
this range is permitted)
mm
(150 ± 1)
a
G
mm
Multi-hole combination tap
(200 ± 3,5)
G 2
mm
(180 ± 5)
G 3
mm
Inlet connections
(12,3 + 0,2)
N 1
mm
Type A size 1/2
N 2 5 mm min
(15,2 ± 0,05)
N 1
Type B size 1/2
mm
30° chamfer/flat 0,3
N 2 13 mm min
(14,7 + 0,3)
N 1
mm
Type C size 1/2
N 2 6,4 mm min
(19,9 + 0,3)
N 1
mm
Type C size 3/4
N 2 6,4 mm min
oSIST prEN 1287:2024
prEN 1287:2024 (E)
Inlet dimensions Comments
∅ 10 mm,
12 mm,
T 15 mm, G Plain end, male or female Copper tube(s) or flexible hose(s)
1/2 or
G 3/8
Tube(s) or flexible hose(s)
U 350 mm min  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
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
Table 5 — Outlet dimensions (remote outlets, single- and multi-hole combination TMVs)
Outlet dimensions Comments
Dimension from lowest point of
the outlet orifice including any
a
flow rate regulator or flow
Outlet orifice
straightener, to the mounting
25 mm
surface.
E — Lowest point
min
NOTE Regulations exist in some
— All taps and outlets
EU Member States that set
dimensions greater than those
indicated in this document.
90 mm
Dimension from the centre of the
D 1 Horizontal mounted combination tap
min
outlet orifice including any flow
rate regulator or flow
Wall mounted combination tap
115 mm
D 3
straightener.
min
Separate spout
A G 1/2 B
Remote outlet In accordance with EN ISO 228-1
A 1 G 3/4 B
7,5 mm
A 4 Outlet 2 Useful thread length
min.
9,5 mm
A 5  Free length of connection
min.
NOTE Nozzle outlets which are not in accordance with EN 246 are covered by 9.5.
a
Nozzle outlets to accept flow rate regulators shall be in accordance with EN 246.

Figure 4 — Remote outlet
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
Table 6 — Mounting dimensions (Single- and multi-hole TMVs)
Dimensions Comments
Shank diameter
24 mm
H 1 Two hole taps size 1/2 Fixed centres
max
29 mm separate outlet, side spray, 3 hole tap size
H 2
max 1/2 Adjustable centres
Single hole tap, 2-hole tap size 1/2 or 3/4
33,5 mm
H 3
max
3-hole tap size 1/2
Base or flange
50 mm
J 1 2-hole tap size 3/4
min
Dimension of base or flange
45 mm Bath, Bath/Shower, Basin, Bidet, Sink tap
J 2
min size 1/2
50 mm
J 3 Single and Multi-hole tap Diameter of clamping washer
max
32 mm
V Basin, Bidet, Sink
max
35 mm
V 1 Bath – Two hole tap Flange projection to rear
max
47 mm
V 3 3-hole tap
max
Minimum range (mm) of
Dimension which allows taps and outlets to be fitted on
L supports, which allows the
to supports of thickness between 1 mm and 18 mm
installation of the TMV
oSIST prEN 1287:2024
prEN 1287:2024 (E)
Key
1 basin; bidet; sink
2 remote spray attachment
Figure 7 — Single hole tap
Figure 8 — Two hole TMV (fixed centres)
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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 D1/D3 dimension shall be coordinated with the appropriate sanitary appliance.
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.
Check valves shall comply with EN 13959.
In the case of sanitary tapware with extractable outlets, backflow prevention shall be in compliance
with EN 16145.
oSIST prEN 1287:2024
prEN 1287:2024 (E)
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, leak
...