EN 14743:2005+A1:2007
(Main)Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
This European Standard specifies requirements relating to the construction and mode of operation and relevant methods of testing of automatic, salt-regenerated, cation exchange softeners for drinking water installations inside buildings which are permanently connected to the mains supply.
Until EAS comes into force, the current national regulations remain applicable.
NOTE Products intended for use in water supply systems should comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. The Member States relevant regulators and the EC Commission agreed on the principle of a future unique European Acceptance Scheme (EAS) which would provide a common testing and approval arrangement at European level.
If and when the EAS is adopted, European Standards on products will be amended by the addition of an Annex Z/EAS under Mandate M/136 which will contain formal references to the testing, certification and product marking requirements of the EAS.
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und Prüfung
Diese Europäische Norm legt Anforderungen hinsichtlich der Konstruktion und der Betriebsart sowie entsprechende Prüfverfahren an automatische, mit Salz regenerierte und nach dem Prinzip des
Kationaustausches wirkende Enthärter für Trinkwasser-Installationen in Gebäuden, die dauerhaft an die Wasserversorgung angeschlossen sind, fest.
Bis das EAS-System in Kraft tritt, haben die derzeitigen nationalen Bestimmungen weiterhin Bestand.
ANMERKUNG Produkte für die Verwendung in Wasserversorgungssystemen müssensollten, so weit vorhanden, die nationalen Bestimmungen und Prüfanordnungen erfüllen, die ihre Eignung für den Kontakt mit Trinkwasser bestätigen. Die für die Mitgliedstaaten zuständigen Behörden und die EU-Kommission haben sich auf die Prinzipien eines zukünftigen einheitlichen Europäischen Zulassungssystems (EAS) geeinigt, welches eine gemeinsame Prüf- und Zulassungsregelung auf europäischer Basis bietet.
Falls und sobald EAS eingeführt ist, werden die Europäischen Produktnormen um einen Anhang Z/EAS unter dem Mandat M/136 ergänzt, in welchem formale Verweise auf die Anforderungen für die Prüfung, die Zertifizierung und die Produktkennzeichnung im Rahmen des EAS gegeben werden.
Appareils de traitement d'eau à l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essais
La présente Norme européenne spécifie les exigences relatives à la construction, au mode de fonctionnement et aux méthodes d’essai correspondantes des adoucisseurs automatiques, échangeurs de cations, à sel régénérant, destinés à des installations d’alimentation en eau potable à l’intérieur des bâtiments et raccordés en permanence à l’alimentation principale.
Les réglementations nationales actuelles restent applicables tant que le Système européen d’acceptation (SEA) n’est pas entré en vigueur.
NOTE Il convient que les produits destinés à un usage dans des systèmes d’alimentation en eau soient conformes, le cas échéant, aux réglementations nationales et aux montages d’essai qui assurent l’aptitude au contact avec l’eau potable. Les organismes de réglementation concernés des États membres et la Commission des communautés européennes se sont mis d’accord sur le principe d’un futur SEA unique définissant des montages d’essai et de validation communs au niveau européen.
À partir de l’adoption du SEA, le cas échéant, les Normes européennes relatives aux produits seront amendées par l’ajout de l’Annexe Z/SEA sous le mandat M/136 qui comportera les références formelles des exigences du SEA en matière d’essais, de certification et de marquage du produit.
Oprema, ki se uporablja za pripravo pitne vode v stavbah - Mehčalci - Zahteve za delovanje, varnost in preskušanje
General Information
- Status
- Published
- Publication Date
- 12-Jun-2007
- Withdrawal Date
- 30-Dec-2007
- Technical Committee
- CEN/TC 164 - Water supply
- Drafting Committee
- CEN/TC 164/WG 13 - Water conditioning equipment inside buildings
- Current Stage
- 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
- Start Date
- 02-Sep-2021
- Completion Date
- 02-Sep-2021
- Directive
- 89/106/EEC - Construction products
Relations
- Effective Date
- 18-Jan-2023
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
prEN 15116 - Ventilation in buildings - Chilled beams - Testing and rating of active chilled beams - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 14743:2005+A1:2007 is a European Standard from CEN that defines requirements for automatic, salt‑regenerated, cation exchange softeners used inside buildings and permanently connected to the mains supply. The standard covers construction, mode of operation, required performance and safety features, and the relevant test methods used to verify compliance. Until a future European Acceptance Scheme (EAS) is adopted, national regulations and testing arrangements remain applicable.
Key topics and requirements
The standard addresses technical and safety aspects including:
- Materials and chemicals
- Requirements for cation exchange resin quality and regenerating salt (reference to EN 973).
- Design and manufacturing
- Mechanical strength and resistance to hydrostatic and cyclic pressure.
- Operating range (temperature, pressure, flow) and electrical safety (alignment with EN 60335‑1).
- Salt tank design, continuity of supply during regeneration (including duplex systems), protection against backflow and brine infiltration (reference to EN 1717).
- Noise limits, air venting, end and drain connections.
- Operating performance
- Initiation of regeneration (timing/monitoring devices), brining efficiency (g CaCO3 per kg salt), salt consumption, regeneration water volume, exchange capacity, residual hardness and pressure drop.
- Definition of nominal flow rate (flow producing a max 100 kPa pressure drop).
- Testing and documentation
- Standardized test rig conditions, water/salt specifications, analytical methods and manufacturing tests (hydrostatic, cyclic, continuity, backflow protection, air displacement).
- Labelling, safety information and required technical documentation.
- Installation, operation and maintenance
- Normative Annex A includes guidance for correct installation and upkeep.
Applications and practical value
EN 14743 is intended for use where reliable softening of drinking water inside buildings is required. Practical applications include:
- Domestic and multi‑dwelling water softening systems
- Commercial buildings (hotels, laundries, hospitals) requiring scale control
- Design and factory production of softeners and control valves
- Type-testing and product certification for market access in CEN member states
- Installation, commissioning and maintenance protocols for plumbing contractors and building services engineers
Who should use this standard
- Manufacturers of water softeners and control valves
- Test laboratories and conformity assessment bodies
- Specifiers, consulting engineers and architects
- Plumbing contractors, building services installers and maintenance teams
- Regulators and water utilities assessing product fitness for contact with drinking water
Related standards (normative references)
Key referenced standards include EN 973, EN 1717, EN 60335‑1, EN ISO 228‑1, EN ISO 3822‑1/‑3, EN ISO 10304‑1, EN ISO 11885 and ISO 7‑1.
Using EN 14743 helps ensure safe, tested and documented water conditioning equipment that meets European expectations for performance, safety and serviceability.
Get Certified
Connect with accredited certification bodies for this standard
ICC Evaluation Service
Nonprofit organization that performs technical evaluations of building products.
Aboma Certification B.V.
Specialized in construction, metal, and transport sectors.
BBA (British Board of Agrément)
UK construction product certification.
Sponsored listings
Frequently Asked Questions
EN 14743:2005+A1:2007 is a standard published by the European Committee for Standardization (CEN). Its full title is "Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing". This standard covers: This European Standard specifies requirements relating to the construction and mode of operation and relevant methods of testing of automatic, salt-regenerated, cation exchange softeners for drinking water installations inside buildings which are permanently connected to the mains supply. Until EAS comes into force, the current national regulations remain applicable. NOTE Products intended for use in water supply systems should comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. The Member States relevant regulators and the EC Commission agreed on the principle of a future unique European Acceptance Scheme (EAS) which would provide a common testing and approval arrangement at European level. If and when the EAS is adopted, European Standards on products will be amended by the addition of an Annex Z/EAS under Mandate M/136 which will contain formal references to the testing, certification and product marking requirements of the EAS.
This European Standard specifies requirements relating to the construction and mode of operation and relevant methods of testing of automatic, salt-regenerated, cation exchange softeners for drinking water installations inside buildings which are permanently connected to the mains supply. Until EAS comes into force, the current national regulations remain applicable. NOTE Products intended for use in water supply systems should comply, when existing, with national regulations and testing arrangements that ensure fitness for contact with drinking water. The Member States relevant regulators and the EC Commission agreed on the principle of a future unique European Acceptance Scheme (EAS) which would provide a common testing and approval arrangement at European level. If and when the EAS is adopted, European Standards on products will be amended by the addition of an Annex Z/EAS under Mandate M/136 which will contain formal references to the testing, certification and product marking requirements of the EAS.
EN 14743:2005+A1:2007 is classified under the following ICS (International Classification for Standards) categories: 71.100.80 - Chemicals for purification of water; 91.140.60 - Water supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 14743:2005+A1:2007 has the following relationships with other standards: It is inter standard links to EN 14743:2005, EN ISO 3822-3:2018, EN ISO 228-1:2003, EN ISO 10304-1:2009, EN 973:2009, EN 1717:2025, EN ISO 3822-1:1999, prEN 15116, EN ISO 11885:2009, EN 15219:2006+A1:2007, EN 806-5:2012, EN 806-2:2005. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 14743:2005+A1:2007 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC, 98/83/EC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 14743:2005+A1:2007 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und PrüfungAppareils de traitement d'eau a l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essaisWater conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing91.140.60Sistemi za oskrbo z vodoWater supply systems71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 14743:2005+A1:2007SIST EN 14743:2006+A1:2007en01-julij-2007SIST EN 14743:2006+A1:2007SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14743:2005+A1
June 2007 ICS 71.100.80; 91.140.60 SupersedesEN 14743:2005English Version
Water conditioning equipment inside buildings - Softeners - Requirements for performance, safety and testing
Appareils de traitement d'eau à l'intérieur des bâtiments - Adoucisseurs - Exigences de performance, de sécurité et essais
Anlagen zur Behandlung von Trinkwasser innerhalb von Gebäuden - Enthärter - Anforderungen an Ausführung, Sicherheit und Prüfung This European Standard was approved by CEN on 26 August 2005 and includes Amendment 1 approved by CEN on 10 May 2007.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14743:2005+A1:2007: ESIST EN 14743:2006+A1:2007
!Installation, operation and maintenance.18 Bibliography.23
5 000 cycles with the pressure fluctuating at a frequency of 15 21+− cycles per minute between 150 kPa and 1,3 times the maximum design pressure as defined in 7.4.2. 4.3.3 Minimum and maximum operating pressure The softener shall operate and regenerate to the requirements of this European Standard with a minimum water supply pressure of 200 kPa and a maximum pressure not less than 60 % of the maximum design pressure when tested in accordance with 7.1.3 d). 4.3.4 Resistance to temperature The softener shall be designed to operate and regenerate to the requirements of this European Standard with water temperatures between 5 °C and 25 °C and with ambient temperatures between 5 °C and 35 °C. 4.3.5 Electrical safety Softening units shall conform to the requirements for safety of electrical appliances in accordance with
EN 60335-1. 4.3.6 Salt tank The salt tank shall be equipped with a cover to prevent the intrusion of dust and foreign bodies, and an overflow of ample dimensions. The capacity of the salt tank shall be such that it permits a minimum of five regenerations between refills. 4.3.7 Continuity of supply during regeneration The softener design shall permit continuity of water supply during regeneration (see 7.4.3). 4.3.8 Protection against backflow and infiltration of brine a) Softener shall include a device to prevent backflow into the main supply, in accordance with the national implementation of EN 1717. If such a device is not evident, the softener shall be tested in accordance with 7.4.4.1. These shall be no water or brine collected from the vacuum reservoir. b) Infiltration of brine into the softened water supply during normal operation shall also be verified by testing in accordance with 7.4.4.2. In no outlet samples, the chloride concentration shall exceed
1,5 mmol/l over that of the inlet water. 4.3.9 Noise level The softening unit shall conform to noise levels defined and measured in accordance with EN ISO 3822-1 and EN ISO 3822-3 for both the service and regeneration runs. SIST EN 14743:2006+A1:2007
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...