An isolation ball valve matches the size of the main line and connects via schedule 80 threaded nipples as required. The PVC main line passes through a 10 inch by 15 inch rectangular box with a 6 inch extension, which is set flush to grade. Two 6 by 2 by 16 inch concrete block caps support the base of the box, one on each side. A 1/2 inch wire cloth gopher screen wraps up the sides at the bottom of the enclosure.
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