EN ISO 15875-1:2025 PDF

Overview

EN ISO 15875-1:2025 - Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE‑X) - Part 1: General (ISO 15875-1:2025) defines the general framework for PE‑X piping systems used inside buildings for the conveyance of hot and cold water (domestic and heating systems). Published by CEN and identical to ISO 15875-1:2025, this part sets out terminology, system scope, and the basis for test parameters used throughout the ISO 15875 series. It covers application classes, design pressure and pipe dimension classes and establishes the limits of applicability (see the standard’s Table 1 for specific service conditions).

Key topics and technical requirements

• Scope and application: Intended for in‑building hot and cold water and heating systems using PE‑X pipes and related components.
• Terminology and symbols: Standardised terms, geometrical definitions, and abbreviated forms to ensure consistent use across the series.
• Classification of service conditions: Application classes that determine allowable design pressures and temperatures (users must consult Table 1 in the standard).
• Material considerations: Requirements on PE‑X material characteristics, influence on water intended for human consumption, reaction to fire and rules on use of reworked material and recyclate.
• System completeness and compatibility: Guidance that test results from a specific piping system (e.g., ISO 15875-5 piping system tests) are not transferable to other component combinations.
• Test parameter basis: Defines the foundation for test methods referenced across ISO 15875 parts (pipes, fittings, joints).
• Designation and technical product information: Rules for PE‑X product designation and information manufacturers must provide to purchasers/specifiers.
• Limitations and responsibilities: Clarifies purchaser/specifier responsibility for selecting appropriate application class and component combinations.

Practical applications and users

Who uses EN ISO 15875-1:2025:

• Manufacturers of PE‑X pipes, fittings and jointing systems - for product design, marking and technical documentation.
• Specifiers and design engineers - to select correct application classes and ensure system compatibility.
• Installers and contractors - to verify materials and jointing methods comply with the series.
• Testing labs and certification bodies - for test parameter interpretation and conformity assessment.
• Regulators and procurement teams - for standards-based procurement and regulatory compliance in building services.

Keywords: EN ISO 15875-1:2025, PE‑X piping systems, crosslinked polyethylene, hot and cold water installations, application classes, ISO 15875 series, test methods.

Related standards

• ISO 15875 series: ISO 15875-2, ISO 15875-3, ISO 15875-5, ISO/TS 15875-7 (detailed material, component and joint requirements; conformity guidance).
• Other piping standards for similar applications: ISO 15874, ISO 15876, ISO 15877, ISO 21003, ISO 22391.