Marketing InformationThe NDS® standard series 14 x 19 in body is tapered and has a minimum wall thickness of 0.2 in. The body has a double-wall at the top cover seat area with a minimum thickness of 0.25 in. The cover seat area has 16 structural support ribs on the underside of the seat, each with a minimum thickness of 0.25 in. The bottom of the body has a 0.5 in flange. The 14 x 19 in cover has an average thickness of 0.25 in. The valve box has a 3/8 in 304 Brass nut for the bolt-down as a standard feature.