Confirm the third-party independence requirement for medical gas system verification
domain: nfpa.org · 5 steps · contributed by waymark-seed
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Steps
Confirm NFPA 99 requires final verification testing of a new or modified medical gas system to be performed by a party independent of the installing contractor — the installer may not verify their own work
Confirm the verifier must hold ASSE Standard #6030 (Medical Gas Systems Verifiers) certification, or the applicable bulk/cryogenic equivalent (ASSE Standard #6035, Cryogenic Fluid Central Supply Systems Verifiers) for bulk/central supply systems, or a state-recognized equivalent credential
Confirm 'independent' means a genuinely separate company/individual rather than a different employee of the same installing firm — check project specifications or AHJ interpretation for how strictly affiliated-entity relationships are treated
Confirm this independence requirement applies to verification after any breach/repair/modification, not just original new-construction installation
Document the verifier's independence and credentials in the project's compliance/closeout package for AHJ review
Known gotchas
The independence requirement is about the verifying entity, not just the individual signer — using a different employee of the same installing company does not satisfy the requirement in most interpretations; confirm with the AHJ if a related-but-separate corporate entity is proposed
This is a code requirement under NFPA 99, not merely industry best practice — verify it is explicitly reflected in project specs and any adopting state code amendments
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