ASSE 5110 Backflow Prevention Tester

RPZ, DCVA, PVB, SVB, AVB, air gaps, and DCDA - components, applications, and selection criteria.

High hazard vs low hazard classification, containment vs isolation, and matching protection to risk level.

Differential pressure gauges, test kit components, calibration requirements, needle valves, and hose management.

Step-by-step RPZ testing - relief valve opening point, check valve differentials, isolation sequence, and pass/fail criteria.

Step-by-step DCVA testing - check valve differentials, tightness verification, test sequence, and pass/fail criteria.

PVB test procedures, AVB inspection, installation requirements, continuous pressure rules, and height clearances.

Orientation, flow direction, drainage, freeze protection, accessibility, and relocation requirements.

Test form requirements, gauge serial numbers, recording readings, repair documentation, and tester certification.

Diagnosing check valve failures, relief valve issues, shutoff valve leakage, high differentials, and thermal expansion effects.