ISO 6182-6-2020 PDF

Full title and description

Fire protection — Automatic sprinkler systems — Part 6: Requirements and test methods for check valves. This International Standard specifies performance, requirements, test methods and marking requirements for check valves used to supply water in automatic fire protection (sprinkler) systems; it is not applicable to trim valves.

Abstract

ISO 6182-6:2020 sets out the functional and test requirements for check valves intended for use in automatic sprinkler systems, covering operational performance, leakage, strength and marking. The standard provides specific test methods to verify compliance but excludes trim valves.

General information

• Status: Withdrawn / superseded (see note below).
• Publication date: 1 March 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.220.20 — Fire protection.
• Edition / version: Edition 2 (2020).
• Number of pages: 12 pages.

Scope

ISO 6182-6:2020 applies to check valves used to supply water in automatic sprinkler systems. It defines required performance levels, constructional and material considerations where relevant to safety and reliability, test procedures to demonstrate compliance (including leakage and endurance tests), and marking information. The document explicitly excludes trim valves. The content was later consolidated into ISO 6182-2:2025 as part of a revision of the series.

Key topics and requirements

• Performance criteria for check valves (operational response, seating and unseating behavior under rated pressures).
• Leakage limits and accepted test methods for verifying tightness and residual leakage.
• Mechanical strength and pressure-resistance testing (body and cover strength tests).
• Endurance and operational-cycle testing to assess long-term reliability.
• Hydraulic characteristics and allowable friction loss in typical sprinkler-system configurations.
• Requirements for non-metallic components, seals and gaskets where they affect performance.
• Marking and information to be provided on the product (identification, rated working pressure, manufacturer, part/reference).
• Notes on applicability: trim valves for alarm valves are excluded and addressed elsewhere in the 6182 series.

Typical use and users

Primary users include manufacturers of check valves and sprinkler-system components, third-party test laboratories, certification bodies, fire-protection system designers and specifiers, building services engineers, and authorities having jurisdiction (AHJs) who reference international test and performance criteria when approving equipment for use in sprinkler installations. Maintenance and commissioning teams also use the standard's test methods for acceptance testing.

Related standards

ISO 6182 is a multipart series covering automatic sprinkler systems and associated components. Relevant related parts include ISO 6182-1 (requirements and test methods for sprinklers; current edition 2021), ISO 6182-2 (requirements and test methods for alarm valves, check valves and related items — the 2025 edition consolidates several parts and supersedes ISO 6182-6), and other parts such as ISO 6182-12 (grooved-end components) and additional parts addressing valves, fittings and accessories used in water-based fire protection systems. Users should refer to ISO 6182-2:2025 for the consolidated, current requirements for check valves.

Keywords

check valve; backflow prevention; automatic sprinkler systems; fire protection; test methods; leakage test; operational performance; marking; ISO 6182; sprinkler system components.

FAQ

Q: What is this standard?

A: ISO 6182-6:2020 is an International Standard that specified requirements and test methods for check valves intended for use in automatic sprinkler systems.

Q: What does it cover?

A: It covered performance criteria, specific test methods (leakage, strength, endurance, operational tests), marking requirements and limits for non-metallic components relevant to check-valve operation in sprinkler systems. Trim valves were excluded.

Q: Who typically uses it?

A: Manufacturers, test laboratories, certification bodies, system designers, building services engineers, maintenance/commissioning teams and authorities having jurisdiction.

Q: Is it current or superseded?

A: ISO 6182-6:2020 has been withdrawn from sale and its contents were consolidated into ISO 6182-2:2025. National distributors and standards bodies report withdrawal from sale/effective withdrawal in mid-2025 (for example, withdrawn effective 1 July 2025 in several national catalogs). For current, consolidated requirements for check valves, consult ISO 6182-2:2025.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 6182 series on automatic sprinkler systems (multiple parts cover sprinklers, valves, grooved components and other accessories). Several parts have been revised/ consolidated in recent years; see ISO 6182-1:2021 and ISO 6182-2:2025 for the most relevant current documents.

Q: What are the key keywords?

A: Check valve, sprinkler system, fire protection, test methods, leakage, operational performance, marking, ISO 6182.