ISO 19220:2021

Overview

ISO 19220:2021 specifies requirements for solid‑wall styrene copolymer blend (SAN + PVC) plastics piping systems used for soil and waste discharge (low and high temperature) inside buildings. It covers pipes, fittings and assemblies for above‑ground applications (not buried pipework) and sets out test parameters for the referenced test methods. Typical uses include domestic wastewater discharge, ventilation stacks associated with waste systems, and internal rainwater pipework. Jointing methods covered are elastomeric sealing rings, solvent cementing, and integral dual‑purpose sockets.

Key topics and technical requirements

• Material (Clause 4): Defines the SAN + PVC compound used for pipes and fittings; additive use and allowance for production reprocessable material are addressed. A typical material composition contains roughly 40–60% SAN (informative note).
• General and appearance requirements (Clause 5): Surface finish, colour uniformity (recommended grey or black) and end‑cut quality.
• Geometrical characteristics (Clause 6): Requirements for outside diameters, effective lengths, chamfering, wall thickness and socket/spigot dimensions; dimensions measured per ISO 3126.
• Mechanical and physical characteristics (Clauses 7–8): Performance expectations and additional mechanical properties for pipes and fittings.
• Performance and test methods (Clauses 9, normative refs): Test parameters and referenced methods for long‑term behaviour, resistance to external blows, vicat softening temperature, watertightness and joint airtightness (see referenced ISO standards such as ISO 2505, ISO 3126, ISO 3127, ISO 13254, ISO 13255).
• Jointing components (Clauses 10–11): Specification for sealing rings and adhesives used for solvent cement joints or elastomeric ring seal joints.
• Marking and installation (Clauses 12–13): Minimum marking requirements for traceability and guidance for system installation.
• Fire behaviour: No specific fire performance is set by ISO 19220; national regulations should be followed.

Applications and who uses the standard

ISO 19220:2021 is intended for:

• Manufacturers of SAN + PVC pipes, fittings and jointing systems
• Product testing laboratories and conformity assessment bodies
• Building services engineers, plumbing specifiers and designers
• Installers and contractors working on internal drainage, soil and waste systems
• Authorities and regulators referencing harmonized product requirements for building installations

Typical applications:

• Domestic soil and waste discharge stacks and branch pipework (low/high temperature)
• Ventilation pipework associated with discharge systems
• Internal rainwater drainage systems

Related standards (selective)

• ISO 2505 - Longitudinal reversion test method
• ISO 3126 - Determination of dimensions for plastics components
• ISO 3127 - Resistance to external blows
• ISO 13254 / ISO 13255 - Watertightness and joint airtightness test methods
• EN 681-2 - Elastomeric seals materials (referenced for sealing rings)

Keywords: ISO 19220:2021, SAN + PVC, plastics piping systems, soil and waste discharge, elastomeric ring seal joints, solvent cement joints, building drainage, ventilation pipework.