Pool and spa single or multiple outlet circulation systems shall be equipped with atmospheric vacuum relief should grate covers located therein become missing or broken. This vacuum relief system shall include at least one approved or engineered method of the type specified herein, as follows:
(a) Safety vacuum release system conforming to ASME A 112.19.17; or
(b) An approved gravity drainage system.
(Ord. 2007-032. Passed 4-10-07.)