// CODE SNIPPET
G106.3 Atmospheric Vacuum Relief System Required
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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:
- Safety vacuum release system conforming to ASME A112.19.17; or
- An approved gravity drainage system.