StacksVerified U.S. regulatory reference

46 CFR §128.430

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each hull penetration for a non-integral keel cooler installation must be made through a cofferdam or at a seachest and must be provided with isolation valves fitted as close to the sea inlet as possible.
  2. (b)Each non-integral keel cooler must be protected against damage from debris and grounding by protective guards or by recessing the cooler into the hull.