Illinois Malleable Iron Co. · Illinois Malleable Iron Co. · leaf 216
, evenwith 16-inch valve. In such case, valve should be covered with earth to within, say, 12 inches of top ofnut, the base thus protecting the working parts of valve. The valve boxes do not have to be as long as the depth to the toj) of the main, as theflange joint of the valve is usually 3 to 6…
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