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507.4 Ground Support
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A water heater supported from the earth shall rest on level concrete or other approved base extending not less than 3 inches (76 mm) above the adjoining ground level.
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507.4 Water Heaters, Ground Support
A water heater supported from the earth shall rest on level concrete or other approved base extending not less than 3 inches (76 mm) above ...
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9.2.5.4.3 Hanging, Bracing, and Restraint of System Piping,
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