Regulations, Codes, and Program Administration
The authority chain
Federal law (Safe Drinking Water Act) sets the frame; the state primacy agency adopts rules; the local water purveyor and building official (AHJ) enforce them through ordinance and plumbing code. A certified tester's authority comes entirely from the AHJ - you test what you are authorized to test, and you report to whom you are told to report. Items asking "who determines testing frequency or device approval in your area?" are answered: the AHJ, not the tester and not the manufacturer.
Containment versus isolation
Containment (premises isolation) protects the public main at the service connection and is usually administered by the water purveyor. Isolation (internal protection) protects fixtures, branches, and zones inside the building and is usually administered by the building official. Confusing the two is a classic trap.
Elements of a program
Legal authority; a device inventory; hazard surveys and classification; device selection from an approved list (e.g., USC FCCCHR, ASSE standards); proper installation; testing by certified personnel; recordkeeping; enforcement; and public education. New construction, change of occupancy, and added processes typically trigger a resurvey.
Traps to expect
- Annual testing is the common requirement - not every five years.
- A device approved in one jurisdiction may not be approved in another; check the local list.
- Tester certification must be current and renewed per the certifying body's cycle; an expired card usually invalidates the test report.
- Non-testable devices (dual check) are permitted only for low hazards where the AHJ allows them.
- Records belong to the program; retain and submit as directed.
Rule of thumb
"If it can make someone sick or kill them, treat it as a health hazard" and require an air gap or RPZ unless the AHJ accepts an alternate. Worked example: a hospital dialysis line is a health hazard; the surveyor documents the hazard, the AHJ selects the device class, and the tester only verifies performance annually.