Closed-type expansion tanks shall be installed in accordance with the manufacturer's instructions Expansion tanks for systems designed to have an operating in excess of 30 psi (207 kPa) shall be constructed and certified in accordance with the ASME and Vessel CodeThe size of the tank shall be based on the capacity of the hot-water-heating system
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All without manholes on top of the except high- and where a greater clearance is required in this table 2: High- with generating capacity not exceeding 5000 pounds per hour 3: High- with generating capacity exceeding 5000 pounds per hour 7
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