IAPMO PS 051-2021 Expansion Joints and Flexible Expansion Joints for DWV Piping

Industry Standard for Expansion Joints and Flexible Expansion Joints for DWV Piping Systems

1 Scope
1.1 Scope
This Standard covers plastic, elastomeric, and metallic expansion joints and flexible expansion joints intended for use in drain, waste, and vent systems and specifies requirements for materials, physical characteristics, performance testing, and markings.