StacksVerified U.S. regulatory reference

46 CFR §153.368

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The pressure side of a required pressure-vacuum relief valve must begin to open only at a pressure exceeding 3.5 kPa gauge (approx. 0.5 psig).
  2. (b)A pressure-vacuum relief valve must meet the requirements of Subpart 162.017 of this chapter.