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Are two drains and vent line required?

April 26, 2017drains line vent

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Are two drains and vent line required?

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A. To be in compliance with ANSI / APSP-7, Suction Entrapment Avoidance in Swimming Pools, Wading Pools, Spas, Hot Tubs and Catch Basins, a single unblockable drain is acceptable in lieu of two drains separated three feet and a vent line.