Mich. Admin. Code R. 408.4291 - Indirectly heated hot water supply tanks

Rule 291. When a hot water supply is heated indirectly by steam in a coil or pipe, the pressure of the steam used shall not exceed the safe working pressure of the hot water tank, and a relief valve of at least 1 inch in diameter, set to relieve at or below the maximum allowable working pressure of the tank, shall be applied on the tank.

Notes

Mich. Admin. Code R. 408.4291
1979 AC

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