4 Ductile Iron Flanged x Mechanical Joint Gate Valve Non-Rising Stem American Water Works Association C515The 4 Ductile Iron Flanged x Mechanical Joint Gate Valve Non Rising Stem American Water Works Association C515 is a non rising stem (NRS) valve designed for water distribution, wastewater, and fire protection systems. It complies with AWWA C515 standards, featuring a resilient wedge for a tight seal and long service life. The NRS design ensures the stem does not move vertically, making it ideal for underground applications. Specification Details TYPE