These durable, lightweight wye valves are constructed of high-quality aluminum with anodized hose threads built for rugged use. The valve opens and closes with a quarter turn. Polymer ball and seat/seal mechanism with o-rings provides a reliable seal and ease of operation at working pressures of 600 psi. All S&H wye valves are manufactured to meet or exceed GSA requirements for use by the US Forest Service. This includes all raw materials and quality control procedures