The 8" Ames 5000RPDA began production in 1989 and was discontinued in 1995. The body was available in galvanized or fused epoxy coating. Check assemblies were a knuckle joint style made of stainless steel. A check retainer clip is required to remove the second check assemblies. First check assemblies require a tong tool for removal. Bronze check seats were replaceable and a seat removal tool is required to service. The relief valve cover has spring tension against it, use caution when servicing. An external sensing line pressurizes the relief valve.