1.1 This specification covers requirements for safety vacuum release systems (SVRS) for use on both residential and commercial swimming pools, spas, hot tubs, and wading pools.

1.2 This specification is intended to reduce the risk of entrapment by providing a rapid detection and rapid release of vacuum or preventing a high vacuum altogether when a person becomes entrapped at the suction outlet serving a pumping system.

1.3 This specification only applies to systems equipped with pumps of similar horsepower and flow rating to those actually tested.

1.4 SVRS units manufactured, previously sold and installed, prior to the publication of this specification, which were compliant to the previous version of this specification, are to be considered compliant with this specification.

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 The following safety hazards caveat pertains only to the test methods section, Section 5, of this specification. 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.