AWWA Solid Wedge Gate Valves – Resilient Seated & Metal Seated: The J&S Valve™ Resilient Seated Gate Valves (2”–48”) is an extra heavy duty robust valve. J&S Valve uses the strongest combination of materials accepted in the waterworks industry for long lasting and dependable service. Design features include: thick wall ductile iron casting per AWWA C509 & C515, EPDM encapsulated ductile iron wedge, stainless steel stem and fasteners. J&S Metal Seated Gate Valves (2"-24") comply with AWWA C500. The J&S Metal Seated Gate Valves are constructed of ductile iron and have stainless steel stems and stainless steel fasteners.