Reference Source

FM 1221

For FM 1221, laboratory is FM Approvals; standard title is Backflow Preventers, verified against its source on 2026-08-10.

Laboratory
FM Approvals verified
Standard number
FM 1221 verified
Standard title
Backflow Preventers verified
Sourceosha.gov
Verified
Review by
DatasetWhich OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

What the source says

FM 1221 | Backflow Preventers |

— osha.gov, retrieved 2026-08-10

Source

Last verified against source: . Due for re-check by . This page as Markdown · OKF bundle · full dataset as JSON.