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The AAMA 501.2 "Quality Assurance and Diagnostic Water Leakage Field Check of Installed Storefronts, Curtain Walls, and Sloped Glazing Systems" is designed to aid in the water-tight testing of large glass areas meant to be permanently closed, such as store fronts, curtain walls, and sloped glazing systems. A constant pressure of between 30-35 psi is applied from a ¾” (19 mm) diameter hose fitted with a nozzle.