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The filling pipe to the gravity tank of any system shall be not less than two inches in diameter.
The water filling pipe to the pressure tanks shall be not less than one and one-half inches in diameter; it shall be run separately from the source of supply with a bronze seat check valve and a renewable disc angle valve provided in the pipe near the tank, the angle valve being placed between the check valve and the tank. The air supply pipe shall be not less than one inch in diameter and shall have a bronze seat check valve and renewable disc angle check valve provided in the pipe near the tank with the angle valve between the tank and check valve. The air supply pipe shall be connected to the tanks above the water level in the tanks.
(Prior code § 91-17; Amend Coun. J. 10-30-96, p. 31216, § 1)