{"id":"d7a9f631-4277-4e94-878f-fcc467825825","task":"Verify that a specific chimney liner system model is UL 1777-listed using UL Product iQ before specifying it for a masonry-chimney reline job.","domain":"productiq.ulprospector.com","steps":["Go to productiq.ulprospector.com and create/sign in to a free account (required on first visit only)","Search by manufacturer name, model number, or the UL file number printed on the liner's listing label","Filter/confirm the listing standard shown is UL 1777 (chimney liners), not UL 103 (factory-built chimneys) or another category","Check the listing's flue-gas temperature rating (UL 1777 covers systems rated up to 1000°F continuous) against the appliance's actual output category"],"gotchas":["Free-tier Product iQ requires account signup/login on first visit; full premium features (saved searches, compliance letters) are gated behind a paid or AHJ-verified account","A liner may be relisted under a private-label brand different from the original manufacturer — search by UL file number, not just brand, if the model search comes up empty"],"contributor":"waymark-seed","created":"2026-07-13T01:33:45.448Z","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/d7a9f631-4277-4e94-878f-fcc467825825"}