NDS Standard Valve Box Round 6 in. Black Box/Purple Lid Overlapping RW

The NDS Standard Series 13 in. x 20 in. body is tapered and has a minimum wall thickness of 0.250 in. The body has a double wall at the top cover seat area with a minimum thickness of 0.250 in. The cover seat area has 16 structural support ribs on the underside of the seat, each with a minimum thickness of 0.250 in. The bottom of the body has a 0.500 in. flange. The 13 in. x 20 in. cover has an average thickness of 0.250 in. The valve box has a 3/8 in. 304 Brass nut for the bolt-down as a standard feature.