EN 12845:2015+A1:2019/prA2
(Amendment)Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung, Installation und Instandhaltung
This European Standard specifies requirements and gives recommendations for the design, installation and maintenance of fixed fire sprinkler systems in buildings and industrial plants, and particular requirements for sprinkler systems that are integral to measures for the protection of life.
This European Standard covers only the types of sprinkler specified in EN 12259 1 (see Annex L).
The requirements and recommendations of this European Standard are also applicable to any addition, extension, repair or other modification to a sprinkler system. They are not applicable to water spray or deluge systems.
It covers the classification of hazards, provision of water supplies, components to be used, installation and testing of the system, maintenance, and the extension of existing systems, and identifies construction details of buildings which are the minimum necessary for satisfactory performance of sprinkler systems complying with this European Standard.
This European Standard does not cover water supplies to systems other than sprinklers. Its requirements can be used as guidance for other fixed firefighting extinguishing systems, provided that any specific requirements for other firefighting extinguishing supplies are taken into account.
This European Standard is intended for use by those concerned with purchasing, designing, installing, testing, inspecting, approving, operating and maintaining automatic sprinkler systems, in order that such equipment will function as intended throughout its life.
This European Standard is intended only for fixed fire sprinkler systems in buildings and other premises on land. Although the general principles might well apply to other uses (e.g. maritime use). For these other uses additional considerations should be taken into account.
The requirements are not valid for automatic sprinkler systems on ships, in aircraft, on vehicles and mobile fire appliances or for below ground systems in the mining industry.
Sprinkler system design deviations might be allowed when such deviations have been shown to provide a level of protection at least equivalent to this European Standard, for example by means of full-scale fire testing where appropriate, and where the design criteria have been fully documented.
Installations fixes de lutte contre l'incendie - Systèmes d'extinction automatique du type sprinkleur - Conception, installation et maintenance
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje, vgradnja in vzdrževanje
General Information
- Status
- Not Published
- Publication Date
- 26-May-2027
- Technical Committee
- CEN/TC 191 - Fixed firefighting systems
- Drafting Committee
- CEN/TC 191/WG 5 - Sprinkler systems
- Current Stage
- 4060 - Closure of enquiry - Enquiry
- Start Date
- 20-Nov-2025
- Due Date
- 02-Apr-2026
- Completion Date
- 20-Nov-2025
Relations
- Effective Date
- 26-Feb-2025
Overview
EN 12845:2015+A1:2019/prA2 (draft amendment, 2025) is a proposed update to the European standard for fixed firefighting systems - automatic sprinkler systems covering their design, installation and maintenance. The prA2 draft integrates references to related parts (EN 17451, EN 12845‑2 and EN 12845‑3) and introduces a series of technical modifications - notably replacing many references to individual “pumps” with “pump sets” and updating requirements for pump documentation, suction piping, electrical supply and testing.
Key topics and technical requirements
- Pump set documentation: Pump set documentation shall be provided in accordance with EN 17451.
- Suction piping and NPSH: Suction piping (valves and fittings included) must ensure the available NPSH at the pump inlet exceeds the required NPSH by at least 1 m at the maximum pump set flow (per Table 14 and EN 17451).
- Pump set starting and testing: Automatic pump set starting can be checked by dropping system pressure; numerous clauses updated to clarify pump set start and testing procedures.
- Electrical supply and cabling:
- Cables for pump sets must be flame-retardant with burning behaviour per EN 60332 (test type 2, B or C).
- Minimum conductor diameter specified as 2.5 mm² Cu.
- Cable sizing: determine current using 150% of the largest possible full-load current of the pump set.
- Diesel-driven pump sets: Diesel pump sets and ancillaries must comply with EN 17451; adequate fresh air in pump rooms is required to maintain manufacturer-specified limits.
- Terminology and clause updates: Multiple clauses, tables and annexes are amended (pump → pump set), and annexes such as ESFR and CMSA are modified to reflect updated application notes.
Applications and who uses this standard
- Fire protection designers and engineers specifying sprinkler system hydraulic calculations and selecting pump sets.
- Installation contractors and commissioning teams validating suction piping, pump starts, electrical supply and monitoring.
- Facilities, warehouse and industrial managers ensuring system maintenance, testing and compliance with European standards.
- Certifying bodies, fire authorities and procurement teams referencing standardized documentation for tenders and approvals.
Related standards
- EN 17451 - pump set documentation and requirements (integrated by prA2)
- EN 12845‑2 and EN 12845‑3 - companion parts referenced in the draft amendment
- EN 60332 - cable flame‑retardant test methods
This draft amendment refines requirements for pump set selection, installation and testing within sprinkler system standards - essential reading for professionals responsible for reliable, code‑compliant sprinkler system design, installation and maintenance. Keywords: EN 12845, automatic sprinkler systems, sprinkler design, pump set, EN 17451, fire pump, NPSH, installation and maintenance, firefighting systems.
Frequently Asked Questions
EN 12845:2015+A1:2019/prA2 is a draft published by the European Committee for Standardization (CEN). Its full title is "Fixed firefighting systems - Automatic sprinkler systems - Design, installation and maintenance". This standard covers: This European Standard specifies requirements and gives recommendations for the design, installation and maintenance of fixed fire sprinkler systems in buildings and industrial plants, and particular requirements for sprinkler systems that are integral to measures for the protection of life. This European Standard covers only the types of sprinkler specified in EN 12259 1 (see Annex L). The requirements and recommendations of this European Standard are also applicable to any addition, extension, repair or other modification to a sprinkler system. They are not applicable to water spray or deluge systems. It covers the classification of hazards, provision of water supplies, components to be used, installation and testing of the system, maintenance, and the extension of existing systems, and identifies construction details of buildings which are the minimum necessary for satisfactory performance of sprinkler systems complying with this European Standard. This European Standard does not cover water supplies to systems other than sprinklers. Its requirements can be used as guidance for other fixed firefighting extinguishing systems, provided that any specific requirements for other firefighting extinguishing supplies are taken into account. This European Standard is intended for use by those concerned with purchasing, designing, installing, testing, inspecting, approving, operating and maintaining automatic sprinkler systems, in order that such equipment will function as intended throughout its life. This European Standard is intended only for fixed fire sprinkler systems in buildings and other premises on land. Although the general principles might well apply to other uses (e.g. maritime use). For these other uses additional considerations should be taken into account. The requirements are not valid for automatic sprinkler systems on ships, in aircraft, on vehicles and mobile fire appliances or for below ground systems in the mining industry. Sprinkler system design deviations might be allowed when such deviations have been shown to provide a level of protection at least equivalent to this European Standard, for example by means of full-scale fire testing where appropriate, and where the design criteria have been fully documented.
This European Standard specifies requirements and gives recommendations for the design, installation and maintenance of fixed fire sprinkler systems in buildings and industrial plants, and particular requirements for sprinkler systems that are integral to measures for the protection of life. This European Standard covers only the types of sprinkler specified in EN 12259 1 (see Annex L). The requirements and recommendations of this European Standard are also applicable to any addition, extension, repair or other modification to a sprinkler system. They are not applicable to water spray or deluge systems. It covers the classification of hazards, provision of water supplies, components to be used, installation and testing of the system, maintenance, and the extension of existing systems, and identifies construction details of buildings which are the minimum necessary for satisfactory performance of sprinkler systems complying with this European Standard. This European Standard does not cover water supplies to systems other than sprinklers. Its requirements can be used as guidance for other fixed firefighting extinguishing systems, provided that any specific requirements for other firefighting extinguishing supplies are taken into account. This European Standard is intended for use by those concerned with purchasing, designing, installing, testing, inspecting, approving, operating and maintaining automatic sprinkler systems, in order that such equipment will function as intended throughout its life. This European Standard is intended only for fixed fire sprinkler systems in buildings and other premises on land. Although the general principles might well apply to other uses (e.g. maritime use). For these other uses additional considerations should be taken into account. The requirements are not valid for automatic sprinkler systems on ships, in aircraft, on vehicles and mobile fire appliances or for below ground systems in the mining industry. Sprinkler system design deviations might be allowed when such deviations have been shown to provide a level of protection at least equivalent to this European Standard, for example by means of full-scale fire testing where appropriate, and where the design criteria have been fully documented.
EN 12845:2015+A1:2019/prA2 is classified under the following ICS (International Classification for Standards) categories: 13.220.20 - Fire protection. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12845:2015+A1:2019/prA2 has the following relationships with other standards: It is inter standard links to EN 12845:2015+A1:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2025
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje,
vgradnja in vzdrževanje
Fixed firefighting systems - Automatic sprinkler systems - Design, installation and
maintenance
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung,
Installation und Instandhaltung
Installations fixes de lutte contre l'incendie - Systèmes d'extinction automatique du type
sprinkleur - Conception, installation et maintenance
Ta slovenski standard je istoveten z: EN 12845:2015+A1:2019/prA2
ICS:
13.220.10 Gašenje požara Fire-fighting
SIST EN en,fr,de
12845:2015+A1:2020/oprA2:2025
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
EN 12845:2015+A1:2019
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA2
August 2025
ICS 13.220.20
English Version
Fixed firefighting systems - Automatic sprinkler systems -
Design, installation and maintenance
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Automatische
d'extinction automatique du type sprinkleur - Sprinkleranlagen - Planung, Installation und
Conception, installation et maintenance Instandhaltung
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 191.
This draft amendment A2, if approved, will modify the European Standard EN 12845:2015+A1:2019. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.
This draft amendment 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12845:2015+A1:2019/prA2:2025 E
worldwide for CEN national Members.
EN 12845:2015+A1 2019/prA2:2025 (E)
Contents Page
European foreword . 4
1 Modification to the European foreword . 5
2 Modification to 4.4.4.4 “Automatic pump set” . 5
3 Modification to 8.5.1 “General” . 5
4 Modification to 8.5.2 “At pump house” . 5
5 Modification to 8.5.3 “At control valve sets” . 5
6 Modification to 8.6.2 “Storage tank and pressure tank supplies” . 5
7 Modification to 8.6.3 “Town main, booster pump, elevated private reservoir and
gravity tank supplies” . 5
8 Modification to 9.3.4 “Reduced capacity tanks” . 5
9 Modification to 9.3.6 “Strainers” . 5
10 Modification to 9.4.1, Table 13 “Nominal diameter of feed pipes or conduits for
settling and suction chambers” . 5
11 Modification to 9.4.2 . 6
12 Modification to 9.4.4 . 6
13 Modification to 9.4.7 . 6
14 Modification to Clause 10 “Pumps” . 6
15 Modification to 10.1. “General” . 6
16 Modification to 10.2. “Multiple pump arrangements” . 6
17 Modification to 10.4. “Maximum temperature of water supply” . 6
18 Modification to 10.6.1 “General” . 6
19 Modification to 10.6.2 “Suction pipe “ . 6
20 Modification to 10.6.2.1 “General” . 6
21 Modification to 10.6.2.2 “Positive head “ . 7
22 Modification to 10.6.2.3 “Suction lift” . 7
23 Modification to 10.6.2.4 “Pump priming” . 7
24 Modification to 10.6.2.5 “Pressure maintenance pump” . 7
25 Modification to Clause 10.7 “Performance characteristics” . 7
26 Modification to 10.7.1 “Pre-calculated systems – LH and OH” . 7
27 Modification to 10.7.2 “Pre-calculated systems – HHP and HHS with no in-rack
sprinklers” . 7
28 Modification to 10.7.3 “Calculated systems” . 7
29 Modification to 10.7.5.2 “Pump start” . 8
30 Modification to 10.7.5.3 “Testing the pressure switches” . 8
EN 12845:2015+A1 2019/prA2:2025 (E)
31 Modification to 10.8.1.2 . 8
32 Modification to 10.8.1.3 . 8
33 Modification to 10.8.2 “Electricity supply” . 8
34 Modification to 10.8.3.1 . 8
35 Modification to 10.8.3.2 . 8
36 Modification to 10.8.4 “Installation between the main switchboard and the pump
controller” . 8
37 Modification to 10.8.5 “Pump controller” . 9
38 Modification to 10.8.6 “Monitoring of pump operation” . 9
39 Modification to 10.8.6.3 and 10.8.6.4 . 9
40 Modification to 10.9.1 “General” . 9
41 Modification to 10.9.2 to 10.9.10 . 9
42 Modification to 10.9.11 . 9
43 Modification to 10.9.12 . 9
44 Modification to 10.9.13 “Engine tests and exercising” . 9
45 Modification to 13.1 “General” . 10
46 Modification to 15.5.1 “Alarm and pump start test valves” . 10
47 Modification to 15.7.2 “Water supply connections” . 10
48 Modification to 18.2.5.2 “Fully calculated installations” . 10
49 Modification to 18.2.6.2 “Diesel pump set” . 10
50 Modification to 18.2.6.3 “Electric motor driven fire pump” . 10
51 Modification to 20.2.2.4 “Automatic pump starting test” . 10
52 Modification to 20.2.2.5 “Diesel engine restarting test” . 10
53 Modification to 20.3.4.2.1 “Automatic pump flow test” . 11
54 Modification to 20.3.4.5 “Pump suction chambers and strainers” . 11
55 Modification to Annex E.3.4 “Pump performance for pre-calculated installations” . 11
56 Modification to Annex H.2.6 “Electrical power” . 11
57 Modification to Annex I.2 “Alarm levels” . 11
58 Modification to Annex J.1 “Minimizing the effects” . 11
59 Modification to Annex N “Control Mode Specific Application Sprinklers: CMSA” . 11
60 Modification to Annex P “ESFR sprinkler protection “ . 12
EN 12845:2015+A1 2019/prA2:2025 (E)
European foreword
This document (EN 12845:2015+A1:2019/prA2:2025) has been prepared by Technical Committee
CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI.
This
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