StacksVerified U.S. regulatory reference

46 CFR §153.355

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When Table 1 requires a PV venting system, the cargo tank must have a PV valve in its vent line. The PV valve must be located between the tank and any connection to another tank's vent line (such as a vent riser common to two or more tanks).