Minnesota Administrative Rules
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4715.2230 TANKLESS AND INSTANTANEOUS TYPE HEATERS.
Tankless and instantaneous type water heaters require pressure relief valves only. Instantaneous electric water heaters that have Underwriters Laboratory approval for use without a relief valve, and that have space containing the heating element of less than three inches in diameter, may be installed without a pressure relief valve.
History:
15 SR 76; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4
Published Electronically:
May 14, 2012
Official Publication of the State of Minnesota
Revisor of Statutes