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PM-504.3.2 Hot water: Hot water equipment shall be provided which is capable of heating water to such a temperature as to permit water to be drawn at every required sink, lavatory, bathtub, shower and laundry facility at a temperature of not less than 110 degrees F (43 degrees C) without reliance on the space heating facilities. Water heating equipment shall be set so that the temperature of water drawn from non-process plumbing fixtures shall not exceed 125 degrees F (52 degrees C).
PM-504.3.2.1 Relief valve: Water heaters shall be equipped with a combination temperature and pressure relief valve and relief valve discharge pipe which is properly installed and maintained.