46 CFR 182.320
§ 182.320 Water heaters.
United States · 46 CFR — Shipping · Status: effective
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- Citation
- 46 CFR 182.320, § 182.320 Water heaters, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/230806
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Full text
(a) A water heater must meet the requirements of parts 53 and 63 of this chapter if rated at not more than 689 kPa (100 psig) and 121 °C (250 °F), except that an electric water heater is also acceptable if it:
(1) Has a capacity of not more than 454 liters (120 gallons);
(2) Has a heat input of not more than 58.6 kilowatts (200,000 Btu per hour);
(3) Is listed under UL 174, UL 1453 (both incorporated by reference; see 46 CFR 175.600) or other standard specified by the Commandant; and
(4) Is protected by a pressure-temperature relief device.
(b) A water heater must meet the requirements of parts 52 and 63 of this chapter if rated at more than 689 kPa (100 psig) or 121 °C (250 °F).
(c) A water heater must be installed and secured from rolling by straps or other devices to the satisfaction of the cognizant OCMI.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.