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New Specification for Dual Drain Systems for Swimming Pools, Spas and Hot Tubs
1. Scope
1.1 This specification establishes requirements for dual drain suction outlet systems constructed using commercially available sumps and ASME A112.19.8-listed outlet covers for use in swimming pools, spas, hot tubs, and wading pools. 1.2 This specification is intended to reduce the risk of drowning or entrapment by providing a standardized method of designing dual drain suction outlet systems and to limit dynamic differential pressure to less than 15 pounds force when one of the pair of dual drains is blocked. 1.3 The values stated in customary English units are to be regarded as the standard. Any values in parentheses are given for information only. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
anti-suction devices; hot tubs; safety vacuum release systems; spas; swimming pools; suction fittings; dual drain systems
