(a) General.
(1) Install buried valves on top of an 18-inch square, three-inch thick, solid concrete pad (minimum dimensions). The concrete pad may be provided by a pre-cast manufacturer or cast-in-place in the field above grade. Concrete used for the pads shall be a minimum 3,000 psi mix. The pads may not be cast-in-place in the pipe trench. Connection to pipe shall be such that there shall be no stress at the joint caused by misalignment or inadequate support of pipe or valve.
(2) Install fittings as recommended by the manufacturer. Fittings shall be blocked or otherwise restrained from movement.
(3) Valve boxes. Set valve boxes flush with finished grade. Box shall be supported so that no stress shall be transmitted to the valve. Operating nut shall be centered in box.
(4) Install valves and other accessories in complete accordance with the manufacturer's recommendations.
(5) Valve boxes shall be set straight with the operating nut centered and supported on two four-inch concrete blocks, to prevent load transfer onto valve body or pipe line. Set top of box at finished grade. Provide a 24-inch x 24-inch wide by six-inch thick concrete pad at top of valve boxes outside paved areas. Pre-cast pads may be allowed by the city.
(6) Air valves.
a. Main shall be drilled for the appropriate size connection.
b. Valve shall be installed on the main line with a service saddle.
c. Install air valve in a flat top manhole as per detail.
(Ord. of 11-7-16, No. 10-16)