oSIST prEN 12909:2026

• Abstract:

  This document is applicable to anthracite used for treatment of water intended for human consumption. This document describes the characteristics of anthracite and specifies the requirements and the corresponding test methods for anthracite. This document gives information on the use of anthracite in water treatment.

• Status: Not Published
• Public Enquiry End Date: 29-Nov-2026
• ICS: 13.060.20 - Drinking water
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 05-Oct-2026
• Due Date: 22-Feb-2027
• Ref Project: prEN 12909 - Products used for treatment of water intended for human consumption - Anthracite

• Revised: SIST EN 12909:2013 - Products used for treatment of water intended for human consumption - Anthracite
• Effective Date: 19-Jan-2023

oSIST prEN 12909:2026 is the Slovenian adoption of draft European Standard prEN 12909 for anthracite used in treating water intended for human consumption. It specifies the product’s characteristics, the requirements it has to meet, and the test methods used to check it in water-treatment applications.

What does oSIST prEN 12909:2026 specify?

oSIST prEN 12909:2026 applies to anthracite used for treatment of water intended for human consumption. The document covers how the material is identified, what physical and chemical properties are relevant, how those properties are tested, and what information has to accompany delivery.

The standard is organized into:

• Scope
• Normative references
• Terms and definitions
• Description
• Physical properties
• Chemical properties
• Test methods
• Labelling, transportation and storage
• Annex A with general information on anthracite

Annex A is informative and gives background material rather than mandatory requirements.

What are the key requirements of oSIST prEN 12909:2026?

oSIST prEN 12909:2026 sets requirements for the product identity, particle size, density, chemical composition, sampling, and delivery information. In practice, these are the points a supplier, laboratory, or buyer checks to confirm that the anthracite matches the declared grade and is suitable for water treatment.

Product description and particle size

Clause 4 identifies the material as carbon, commonly called natural anthracite, and notes that it is supplied in different particle size ranges. Clause 5 requires a black, lustrous granular material that is generally homogeneous and free from visible extraneous matter.

Clause 5.2 requires particle size distribution to be measured on samples taken at the point of manufacture. The size can be declared either by characteristic sizes and uniformity, or by a stated size range with limits for oversize and undersize. This matters because the grain size affects filtration performance and bed behaviour.

Density and composition

Clause 5.3 specifies limits for bulk density in both loose and packed condition. This helps users compare grades and predict how much media will fit into a filter and how it will settle in service.

Clause 6 sets the chemical quality of the commercial product through limits for key constituents such as carbon, ash and volatile matter. It also requires that other impurities or additives, when relevant, be communicated to the user and, where needed, to the authorities. In practice, this supports product selection and helps manage any impact on treated water quality.

Sampling and test methods

Clause 7 is important for conformity assessment. It states that laboratory samples are prepared in accordance with EN 12902, and only samples taken at the production site are valid for conformity assessment under this document.

Clause 7 also directs the analytical methods to EN 12902 for particle size distribution, bulk density, carbon content, ash and volatile matter. This means the standard relies on a common test framework rather than defining separate test procedures for each property.

Delivery, marking and storage

Clause 8 covers packaging, transport and storage. Anthracite may be delivered in bags, semi-bulk containers or bulk, and the delivery means must not contaminate the product. Marking has to identify the product, particle size range, quantity, supplier or manufacturer, and conformity to EN 12909.

Clause 8 also says the material can be stored for an unlimited period under dry, clean conditions, with packaging protected from direct sunlight and ultraviolet (UV) radiation. For users, this is the practical guidance needed to preserve product quality before installation.

What terms does oSIST prEN 12909:2026 define?

oSIST prEN 12909:2026 uses the terms, definitions and symbols from EN 12901.

• Anthracite - the carbon-based filter material covered by the standard, supplied as natural anthracite.
• Natural anthracite - the common name used in Clause 4 for the product.
• Effective size - the characteristic particle size used to describe the grain-size distribution.
• Uniformity coefficient (U) - a measure used with effective size to describe how uniform the particle sizes are.
• Bulk density, loose - the density of the media when poured without packing.
• Bulk density, packed - the density after the material has been compacted or settled.
• Oversize - particles above the declared size range.
• Undersize - particles below the declared size range.

Who uses oSIST prEN 12909:2026?

oSIST prEN 12909:2026 is used by manufacturers and suppliers of anthracite, water-treatment operators, testing laboratories, and buyers who specify filter media for drinking-water treatment. It also supports quality control, incoming inspection, product marking, and conformity assessment.

What changed in oSIST prEN 12909:2026 from the previous edition?

oSIST prEN 12909:2026 will supersede EN 12909:2012. The foreword states one technical change: the ash content in Table 1 has been updated.

Which standards are used with oSIST prEN 12909:2026?

oSIST prEN 12909:2026 cites two normative references:

• EN 12901 - provides the terms, definitions and symbols used in the document.
• EN 12902 - provides the sampling and test methods used for the anthracite properties.

What does the oSIST prEN 12909:2026 document contain?

oSIST prEN 12909:2026 contains one main composition table in Clause 6, plus background tables in Annex A. Table 1 in Clause 6 sets the commercial-product composition limits, while Table A.1 gives typical ash composition values and Table A.2 gives example particle-size ranges.

The document also includes practical procedures for sampling, laboratory analysis, marking, delivery, and storage. Annex A adds background on raw material, manufacturing, typical properties, use in single and multimedia filters, hydraulic characteristics, handling, and emergency actions.

SLOVENSKI STANDARD
01-november-2026
Proizvodi, ki se uporabljajo za pripravo pitne vode - Antracit
Products used for treatment of water intended for human consumption - Anthracite
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Anthrazit
Produits utilisés pour le traitement de l’eau destinée à la consommation humaine -
Anthracite
Ta slovenski standard je istoveten z: prEN 12909
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2026
ICS 71.100.80 Will supersede EN 12909:2012
English Version
Products used for treatment of water intended for human
consumption - Anthracite
Produits utilisés pour le traitement de l'eau destinée à Produkte zur Aufbereitung von Wasser für den
la consommation humaine - Anthracite menschlichen Gebrauch - Anthrazit
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 12909:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
4.1 Identification . 5
4.1.1 Chemical name . 5
4.1.2 Synonym or common name . 5
4.2 Commercial forms . 5
5 Physical properties . 5
5.1 Appearance . 5
5.2 Particle size distribution . 6
5.3 Density . 6
5.3.1 Bulk density, loose. 6
5.3.2 Bulk density, packed . 6
6 Chemical properties . 6
7 Test methods . 7
7.1 Sampling . 7
7.2 Analysis . 7
7.2.1 Particle size distribution . 7
7.2.2 Bulk density, loose. 7
7.2.3 Bulk density, packed . 7
7.2.4 Content of carbon . 7
7.2.5 Ash . 7
7.2.6 Content of volatile material . 7
8 Labelling, transportation and storage. 8
8.1 Means of delivery . 8
8.2 Labelling . 8
8.3 Transportation . 8
8.4 Marking . 8
8.5 Storage (long-term stability) . 8
Annex A (informative) General information on anthracite . 9
Bibliography . 12

European foreword
This document (prEN 12909:2026) 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 12909:2012.
In comparison with the previous edition, the following technical modifications have been made:
— Updating the ash content in Table 1 (Clause 6).
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.
NOTE Conformity with this document does not confer or imply acceptance or approval of the product in any of
the Member States of the EU or EFTA. The use of the product covered by this document is subject to regulation or
control by National Authorities.
1 Scope
This document is applicable to anthracite used for treatment of water intended for human consumption.
This document describes the characteristics of anthracite and specifies the requirements and the
corresponding test methods for anthracite. This document gives information on the use of anthracite in
water treatment.
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 12901, Products used for treatment of water intended for human consumption - Inorganic supporting
and filtering materials - Definitions
EN 12902, Products used for treatment of water intended for human consumption - Inorganic supporting
and filtering materials - Methods of test
3 Terms and definitions
For the purposes of this document, the terms, definitions and symbols given in EN 12901 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/
4 Description
4.1 Identification
4.1.1 Chemical name
Carbon.
4.1.2 Synonym or common name
Natural anthracite.
4.2 Commercia
...