1.1 This specification establishes requirements and test methods for dimensions and tolerances of central-vacuum hose inlet valve sockets.

1.2 All notes and footnotes shall be considered as non-mandatory requirements of the specification.

1.3 This specification does not apply to inlet valve back-up (or mounting) plates.

1.4 This standard is applicable to universal valves marked with ASTM F2863, and does not limit proprietary valve designs.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.