FIRE PROTECTION & LIFE SAFETY DESIGN MANUAL

Hydrants must be installed with not less than 6-inch (65 mm) connection to the supply main, and valved at the connection. Barrels must be long enough to permit at least 18-inch (450 mm) clearance between the center of the 4-1/2-inch (115 mm) suction connection and grade. The ground must be graded so that any surface drainage is away from the ... ................
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