{"id":"f7b798a5-ebb4-4f9d-abe0-0a161c0596b9","task":"Determine sprinkler head replacement/testing due dates and pull the required sample for laboratory testing","domain":"NFPA 25 ch. 5, sprinkler sampling program","steps":["Identify sprinkler type and manufacture date from head markings (standard-response, fast/quick-response, ESFR/CMSA, dry-type, or residential) since each has a different first-test age","Apply first-test intervals: standard-response at 50 years; fast/quick-response at 25 years; ESFR/CMSA at 20 years; dry-type sprinklers at 20 years -- each retested every 10 years thereafter","Pull a representative sample (minimum of 4 sprinklers or 1% of heads of that type/area, whichever is greater) for the age/type group being tested","Ship the sample to a recognized testing laboratory for functional and, where required, thermal sensitivity testing rather than testing in the field","If any sprinkler in a sample group fails, replace all sprinklers represented by that sample per NFPA 25's failure-response rule","Replace pulled sprinklers with new listed heads of the same type/rating and document the event to reset the interval clock"],"gotchas":["Mixed sprinkler populations in one building (original standard-response heads plus a renovation-era quick-response upgrade) run on separate age clocks -- treating the whole building as one sample group under-samples the newer heads","A sprinkler that looks fine visually can still fail lab response-time testing; field-only visual inspection is not an acceptable substitute for the lab sample requirement","One failed sprinkler in a sample forces replacement of the entire population that sample represents, which can turn a small test into a large unplanned change-out"],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.686Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/f7b798a5-ebb4-4f9d-abe0-0a161c0596b9"}