Codes, Standards, and Regulatory Requirements
Core Concepts
Know the roles of key standards: ASSE 1001 covers atmospheric vacuum breakers, ASSE 1013 covers reduced-pressure principle assemblies, ASSE 1015 covers double check assemblies, ASSE 1020 covers pressure vacuum breakers, and ASSE 1055 covers spill-resistant vacuum breakers. Installation and testing requirements are often governed by local plumbing codes and the authority having jurisdiction (AHJ).
Understand the hierarchy: manufacturer instructions, adopted codes, and AHJ rulings. Know that assemblies must be installed in accessible locations, protected from freezing, and tested at installation, after repair, and at intervals set by the AHJ. Annual testing is common. Records must be retained and submitted as required.
Recognize that a device must be listed and approved for the application. Using an unapproved device or installing it contrary to listing is a violation even if it "works."
Traps in Questions
A frequent trap is assuming a national standard overrides a local code; the AHJ governs. Another trap is confusing standard numbers or assuming a device approved for one hazard class is approved for another. Questions may also test whether testing frequency is fixed nationally; it is set locally.
Rule of Thumb
When a question asks which requirement applies, the AHJ and adopted local code control, provided the device is listed and installed per manufacturer instructions.