33 C.F.R. § 159.109 Pressure test.
Title 33 - Navigation and Navigable Waters
Any sewage retention tank that is designed to operate under pressure must be pressurized hydrostatically at a pressure head of 7 feet or to 150 percent of the maximum pressure specified by the manufacturer for operation of the tank, whichever is greater. The tank must hold the water at this pressure for 1 hour with no evidence of leaking.
Title 33: Navigation and Navigable Waters
PART 159—MARINE SANITATION DEVICES
Subpart C—Design, Construction, and Testing
§ 159.109 Pressure test.
