prEN 14453

SLOVENSKI STANDARD
01-maj-2026
Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka -
Cevni prekinjalnik z odprtinami za stalni dovod zraka, DN 10 do DN 20 – Družina D,
tip C
Devices to prevent pollution by backflow of potable water - Pipe interrupter with
permanent atmospheric vent DN 10 to DN 20 - Family D, type C
Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch
Rückfließen - Rohrunterbrecher mit ständig geöffneten Luftein-trittsöffnungen, DN 10 bis
DN 20 - Familie D, Typ C
Dispositifs de protection contre la pollution de l'eau potable par retour - Rupteur à évent
atmosphérique permanent DN 10 à DN 20 - Famille D, type C
Ta slovenski standard je istoveten z: prEN 14453
ICS:
13.060.20 Pitna voda Drinking water
23.060.50 Blokirni ventili Check valves
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2026
ICS 13.060.20; 23.060.50 Will supersede EN 14453:2005
English Version
Devices to prevent pollution by backflow of potable water
- Pipe interrupter with permanent atmospheric vent DN
10 to DN 20 - Family D, type C
Dispositifs de protection contre la pollution de l'eau Sicherungseinrichtungen zum Schutz des Trinkwassers
potable par retour - Rupteur à évent atmosphérique gegen Verschmutzung durch Rückfließen -
permanent DN 10 à DN 20 - Famille D, type C Rohrunterbrecher mit ständig geöffneten Luftein-
trittsöffnungen, DN 10 bis DN 20 - Familie D, Typ C
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14453:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Nominal size . 7
5 Designation . 7
6 Marking and technical documents . 7
6.1 Marking . 7
6.2 Technical documents . 8
7 Graphic symbol . 8
8 General design characteristics . 9
8.1 Design principle . 9
8.2 Connections . 9
8.3 Air inlets . 9
9 Materials and surface finishes . 9
9.1 General. 9
9.2 Materials . 10
9.3 Dezincification resistant copper alloy . 10
9.4 Corrosion resistance . 10
10 Tolerances of parameters and accuracy of measure instruments . 10
10.1 Tolerances on set parameters . 10
10.2 Accuracy of measuring instruments . 10
10.3 Test media . 10
11 Characteristics and tests . 11
11.1 General. 11
11.2 Test sequence . 11
11.3 Visual verification . 11
11.3.1 Procedure . 11
11.3.2 Verification of dimensional requirements of air inlets . 11
11.4 Bending moment . 11
11.4.1 General. 11
11.4.2 Test equipment . 12
11.4.3 Procedure . 12
11.4.4 Requirement . 12
11.5 Vacuum test . 13
11.5.1 Test equipment . 13
11.5.2 Procedure . 13
11.5.3 Requirement . 13
11.6 Flow rate and leakage test . 14
11.6.1 Testing equipment . 14
11.6.2 Flow rate test . 14
11.6.3 Requirement . 14
11.6.4 Leakage test . 14
11.6.5 Requirement . 14
12 Acoustic characteristics . 15
12.1 General . 15
12.2 Procedure . 15
12.2.1 Mounting and operating conditions . 15
12.2.2 Test methods . 15
12.3 Test criteria . 15
12.3.1 Expression of the results . 15
12.3.2 Noise classification . 15
Annex A (informative) Sampling and test sequence . 16
Annex B (informative) Pressure take-off tee . 17
Bibliography . 21

European foreword
This document (prEN 14453:2026) 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 14453:2005.
This document has been developed with reference to EN°1717 “Protection against pollution of potable
water in water installations and general requirements of devices to prevent pollution by backflow”.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused
by the product covered by this document:
a) this document provides no information as to whether the product may be used without restriction in
any of the Member States of the EU or EFTA;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of this product remain in force.
1 Scope
This document specifies the field of application, the dimensional, the physico-chemical properties and
the properties of general hydraulic, mechanical and acoustic design of pipe interrupters with permanent
atmospheric vent family D Type C, intended to prevent pollution of potable water by backflow, caused by
backsiphoning only.
It is applicable to pipe interrupters with permanent atmospheric vent in denominations DN 10 up to
DN 20.
It covers pipe interrupters with permanent atmospheric vent of PN 10 that are capable of working
without modification or adjustment:
— at any pressure, up to 1 MPa (10 bar);
— with any pressure variation, up to 1 MPa (10 bar);
— in permanent duty at a limited temperature of 65 °C and for maximum 1 h at 90 °C.
It specifies also the test methods and requirements for verifying their characteristics, the marking and
the presentation at delivery.
Backflow protection devices integrated in flushing valves are similar to DC and are not covered under
this document. The requirements are stated in EN 12541.
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 248, Sanitary tapware — General specification for electrodeposited coatings of Ni-Cr
EN 806-1:2000, Specifications for installations inside buildings conveying water fo
...