oSIST prEN 17821:2022

Frost resistant outdoor taps for outdoor use - General technical specification

This document specifies general construction, performance and material requirements for the tapware FRT, PN 10. The application in the drinking water installation with a static pressure of maximum 1,0 MPa (10 bar) and a distribution temperature of maximum 25 °C (PWC).
The conditions of use are according to the following Table 1:
[Table 1 - Conditions of use]
[Figure 1 - The different areas of FRT]

Frostbeständige Außenarmaturen für den Außenbereich - Allgemeine technische Spezifikation

Dieses Dokument legt allgemeine Konstruktions-, Betriebs- und Materialanforderungen für die Armaturen FRT, PN 10 fest. Die Anwendung in der Trinkwasserinstallation mit einem statischen Druck von maximal 1,0 MPa (10 bar) und einer Verteilungstemperatur von maximal 25 °C (PWC).
Die Einsatzbedingungen sind in der folgenden Tabelle 1 aufgeführt:
[Tabelle 1 - Einsatzbedingungen]
[Bild 1- Die verschiedenen Bereiche von FRT]

Robinets résistant au gel pour une utilisation en extérieur - Spécifications techniques générales

Le présent document spécifie les exigences générales relatives à la conception, à la performance et aux matériaux pour la robinetterie FRT, PN 10. L’application dans l’installation d’eau potable avec une pression statique de 1,0 MPa (10 bar) maximum et une température de distribution de 25 °C (EPF) maximum.
Les conditions d’utilisation sont conformes au Tableau 1 suivant :
[Tableau 1 - Conditions d’utilisation]
[Figure 1 - Différentes zones du FRT]

Proti zmrzali odporne zunanje pipe za zunanjo uporabo - Splošna tehnična specifikacija

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Apr-2022
• ICS: 23.060.01 - Valves in general
• ICS: 91.140.60 - Water supply systems
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 16-Feb-2022
• Due Date: 06-Jul-2022
• Ref Project: prEN 17821 - Frost resistant outdoor taps for outdoor use - general technical specification

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 17821:2022
01-april-2022
Proti zmrzali odporne zunanje pipe za zunanjo uporabo - Splošna tehnična
specifikacija
Frost resistant outdoor taps for outdoor use - General technical specification
Frostbeständige Außenarmaturen für den Außenbereich - Allgemeine technische
Spezifikation

Robinets résistant au gel pour une utilisation en extérieur - Spécifications techniques

générales
Ta slovenski standard je istoveten z: prEN 17821
ICS:
23.060.01 Ventili na splošno Valves in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
oSIST prEN 17821:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17821:2022
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oSIST prEN 17821:2022
DRAFT
EUROPEAN STANDARD
prEN 17821
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2022
ICS 23.060.01; 91.140.60
English Version
Frost resistant outdoor taps for outdoor use - general
technical specification

Robinets résistant au gel pour une utilisation en Frostbeständige Außenarmaturen für den

extérieur - Spécifications techniques générales Außenbereich - 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, Turkey 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

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17821:2022 E

worldwide for CEN national Members.
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oSIST prEN 17821:2022
prEN 17821:2022 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 5

4 Materials ............................................................................................................................................................ 6

4.1 General................................................................................................................................................................ 6

4.2 Dezincification resistant copper alloy .................................................................................................... 6

4.3 Corrosion ........................................................................................................................................................... 6

5 Characteristics ................................................................................................................................................. 7

5.1 Dimensions and Design ................................................................................................................................ 7

5.2 Protection unit ................................................................................................................................................. 9

5.3 Resistance against to damage by frost .................................................................................................... 9

5.4 Types of connection ....................................................................................................................................... 9

5.5 General tolerances ....................................................................................................................................... 10

6 Test methods and requirements ............................................................................................................. 10

6.1 Determination of automatic drainage ................................................................................................... 10

6.2 Determination of resistance against damage by frost by controlled expansion ................... 11

6.3 Leak tightness characteristics .................................................................................................................. 12

6.4 Bending test .................................................................................................................................................... 13

6.5 Torsion strength of control elements .................................................................................................... 15

6.6 Mechanical endurance characteristics of the operating mechanism ........................................ 15

6.7 Resistance under internal pressure ....................................................................................................... 17

6.8 Flow rate .......................................................................................................................................................... 18

6.9 Acoustic behaviour ....................................................................................................................................... 19

7 Marking and technical product information ...................................................................................... 19

7.1 General.............................................................................................................................................................. 19

7.2 Marking ............................................................................................................................................................ 19

7.3 Technical product information ................................................................................................................ 20

Annex A (informative) Tests and sampling ...................................................................................................... 21

Bibliography ................................................................................................................................................................. 22

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oSIST prEN 17821:2022
prEN 17821:2022 (E)
European foreword

This document (prEN 17821:2022) 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.

The requirements with regard to the drinking water quality are specified in national regulations.

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oSIST prEN 17821:2022
prEN 17821:2022 (E)
1 Scope

This document specifies general construction, performance and material requirements for the tapware

FRT, PN 10. The application in the drinking water installation with a static pressure of maximum

1,0 MPa (10 bar) and a distribution temperature of maximum 25 °C (PWC).
The conditions of use are according to the following Table 1:
Table 1 — Conditions of use
Supply Dimension Operating Range
Pressure recommended limits
DN 15
Pressure static — max. ≤ 1,0 MPa (10,0 bar)
Pressure dynamic — min. ≥ 0,1 to 0,5 MPa (1 to 5 bar) ≥ 0,05 MPa (0,5 bar)
DN 20
Temperature cold — PWC ≤ 25 °C
Key
1 indoor area
2 area in the wall
3 outdoor area
Figure 1 — The different areas of FRT
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 1254 series, Copper and copper alloys - Plumbing fittings

EN 1333, Flanges and their joints - Pipework components - Definition and selection of PN

EN 1488:2021, Building valves - Expansion groups - Tests and requirements

EN 1717, Protection against pollution of potable water in water installations and general requirements of

devices to prevent pollution by backflow

EN 13959, Anti-pollution check valves - DN 6 to DN 250 inclusive family E, type A, B, C and D

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oSIST prEN 17821:2022
prEN 17821:2022 (E)

EN 14451, Devices to prevent pollution by backflow of potable water - In-line anti-vacuum valves DN 10 to

DN 50 inclusive - Family D, type A

EN 14454, Devices to prevent pollution by backflow of potable water - Hose union backflow preventer DN

15 to DN 32 - Family H, type A

EN 14455, Devices to prevent pollution by backflow of potable water - Presssurised air inlet valves DN 15

to DN 50 - Family L, type A and type B

EN 15096, Devices to prevent pollution by backflow of potable water - Hose Union anti-vacuum valves -

DN 15 to DN 25 inclusive Family H, type B and type D - General technical specification

EN ISO 3822-1, Acoustics - Laboratory tests on noise emission from appliances and equipment used in

water supply installations - Part 1: Method of measurement (ISO 3822-1)

EN ISO 3822-2, Acoustics - Laboratory tests on noise emission from appliances and equipment used in

water supply installations - Part 2: Mounting and operating conditions for draw-off taps and mixing valves

(ISO 3822-2)

EN ISO 6708, Pipework components - Definition and selection of DN (nominal size) (ISO 6708)

EN ISO 6509-1, Corrosion of metals and alloys — Determination of dezincification resistance of copper

alloys with zinc — Part 1: Test method (ISO 6509-1)

EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1717 and the following apply.

ISO and IEC maintain terminological 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
FRT
frost resistant taps for outdoor use defined by:

— method of achieving frost resistance (for example by drainage or by volume compensation)

— pre-assembled or assembled on-site
— fix and adjustable length
one or two outlets (must be safe for every outlet)
3.2
PWC
potable water cold

Note 1 to entry: The temperature is not higher than 25 °C according to the European Drinking Water Directive.

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oSIST prEN 17821:2022
prEN 17821:2022 (E)
3.3
indoor area
area inside of the wall of the buildings
Note 1 to entry: The air temperature shall be higher than 0 °C.
3.4
area in the wall
the wall of the building.
Note 1 to entry: Locally the temperature can be lower than 0 °C.
3.5
outdoor area
area in front of the wall of the buildings
3.6
nominal size

nominal sizes (DN) of FRT, corresponding to EN ISO 6708 and related to the size of the inlet connection

end
3.7
nominal pressure
nominal pressures PN 10 applies, corresponding to EN 1333
4 Materials
4.1 General

The end connection in the indoor area (1) and the body in the front of the wall (3) — as indicated in

Figure 1 — shall be made of metallic materials.

All materials which coming into contact with water intended for human consumption shall present no

health risk nor cause any change to the water in terms of quality, appearance, smell or taste.

NOTE It is noted that while awaiting the adoption of verifiable European criteria for testing materials in

contact with water intended for human consumption, existing national regulations concerning the use and/or the

characteristics of these products remain in force.
4.2 Dezincification resistant copper alloy

Copper-zinc alloys containing more than 10 % zinc are subject to dezincification when submitted to

water capable of dezincification. In the countries where the use of products made of dezincification

resistant materials is required, the materials used shall guarantee a dezincification depth less than

200 µm in any direction. For this purpose, materials shall be tested in accordance with EN ISO 6509-1

and the product shall be marked in compliance with the indications according to Clause 7.

4.3 Corrosion
4.3.1 General

The applied materials shall be corrosion resistant or protected against corrosion. The materials used

may not have an adverse effect on each other.
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oSIST prEN 17821:2022
prEN 17821:2022 (E)
4.3.2 Corrosion resistance test
4.3.2.1 General

The purpose of the corrosion resistance test is to qualify all used materials of the external part of the

FRT (Figure 1, area 3), especially when used in a humid atmosphere where condensation water may

occur. The whole FRT shall be tested, not only the parts in contact with potable water, e.g. springs,

spring caps etc.
4.3.2.2 Test method

Samples shall be prepared for the corrosion resistance test as described as follows.

Carry out the test under the conditions described in EN ISO 9227 specifically for the neutral saline-

spray test, in the following way:

a) Subject the device to spraying for at least 100 h, interrupt the spraying treatment for (48 ± 1) h

while maintaining the heat in the tank and resume the spraying treatment for another (100 ± 1) h.

b) For the duration of the tests, the tank should only be opened to check and maintain the conditions,

the maximum rest period in spraying being 30 min per day. The heating should not be interrupted;

samples under test should not be handled, washed or checked.

c) After treatment and before visual examination, rinse the test samples in water to remove any salt

residue.
4.3.2.3 Requirements
The FRT shall comply with the requirements given in EN 1488:2021, 9.3.2.

After the test, the FRT shall be disassembled and inspected visually for corrosion. No corrosion shall

occur on any component.
5 Characteristics
5.1 Dimensions and Design

For the different kind of FRT are the defined distances and requirements in this document to fulfil.

The design and construction of components without defined dimensions permits various design

solutions to be adopted by the manufacturer.

The minimum required distances to the wall are shown in Table 2. Figure 2 and Figure 3 are only an

illustration of possibilities for design/construction.
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oSIST prEN 17821:2022
prEN 17821:2022 (E)
Key
Figure 2 — Outlet dimensions for FRT (“front operated”)

NOTE For the “front operated” FRT other designs and/or angles for the outlet are possible.

Key
Figure 3 — Outlet dimensions for FRT (“above operated”)
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oSIST prEN 17821:2022
prEN 17821:2022 (E)
Table 2 — Outlet dimensions
Dimensions in mm
D min. 30
A min. 30

NOTE For the “above operated” FRT other designs are possible. The distance D is between the wall and the

cross point of middle line and thread end is to measure.
5.2 Protection unit
A protection unit shall be integrated in the complete product.
Backflow prevention and combination shall be according to EN 1717.

When/If the tap has the possibility to connect fitting/pipe to the outlet the backflow prevention shall

comply with the according product standard:
— EN 14454 (HA)
— EN 15096 (HD)
— EN 14455 (LB)
— EN 13959 (EB) in combination with EN 14451 (DA)
5.3 Resistance against to damage by frost
5.3.1 General

FRT shall be prevented for damage by frost by means of valves with drainage function. Following two

kinds of resistance against to damage by frost are possible:
— automatic drainage;
— controlled expansion (without drainage function).
5.3.2 FRT with automatic drainage
The test procedure for FRT with automatic drainage as defined in 6.1.
5.3.3 FRT with controlled expansion (without drainage function)

The test procedure for FRT with controlled expansion (without drainage function) as defined in 6.2.

5.4 Types of connection

Inlet connections shall comply with the EN 1254 series, with the exception of EN 1254-1 and EN 1254-5

(ends for capillary soldering or capillary brazing to copper tubes).

Valves with threaded connection ends shall have flats on the body which, when used for fitting, shall

accommodate commercially available tools.

The connection ends as applied shall be suitable (and approved as such) for the nominal pressure of the

valve.
Other types of connection are approved if they have been proven suitable.
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oSIST prEN 17821:2022
prEN 17821:2022 (E)
5.5 General tolerances
5.5.1 Tolerance of set parameters
In the absence of any particular specifications:
— flow rate and pressure: ± 2 % of the value specified;

— temperature: cold water ± 5 °C of the value specified; other values ± 2 °C of the value specified

10 %
— time of the value specified.
5.5.2 Accuracy of measuring instruments

All the measuring instruments shall have an error limit of ± 2 % of the measured value.

6 Test methods and requirements
6.1 Determination of automatic drainage
6.1.1 General

This clause describes a test method that shall be carried out to verify the determination of automatic

drainage of the complete FRT and specifies the test criteria.
6.1.2 Test method
6.1.2.1 Principle

a) Determine the weight (M ) of the empty tap and cap(s) with an accuracy of ± 1 g.

b) Fill the tap completely with water, close the outlet(s) with a cap and also close the vacuum breaker.

c) Determine the total weight of the tap filled with water (M ), with an accuracy of ± 1 g.

d) Drain the tap
...