Z168.13-97

1. Scope 1.1 This Standard applies to ancillary devices for use in respiratory therapy that are intended to be directly attached to medical-air flowmeters complying with CSA Standard Z305.3. Its purpose is to ensure that all such equipment can be connected only to flow-metering devices and pressure regulators whose outlet connectors are specific for medical air. 1.2 This Standard applies to new equipment and is not retroactive.