{"data":{"id":"us/42-cfr-84.112","jurisdiction":"us","citation":"42 CFR 84.112","heading":"Canisters and cartridges in parallel; resistance requirements.","body":"Where two or more canisters or cartridges are used in parallel, their resistance to airflow shall be essentially equal.","path":["Title 42—Public Health","CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER G—OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES","PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES","Subpart I—Gas Masks"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"0c08e3b1cd322c6644bbe033950dd57b0e28611428fa63e2192d79de39c5e079","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-84.111","next":"us/42-cfr-84.113"},"notice":"GroundRules: Original legal text. Not legal advice."}