Fire Protection › Flanged Ductile Iron Swing Check Valves Image 1 of 1 Flanged Ductile Iron Swing Check Valves $0.00 Add To Cart Added! Size: 2-1/2 IN, 3 IN, 4 IN, 6 IN, 8 IN, 10 IN, 12 INManufacturers:Reliable REL-FCV-L501FMueller A2122-BCla-Val GF50United / PUPCO 8700 Size: 2-1/2 IN, 3 IN, 4 IN, 6 IN, 8 IN, 10 IN, 12 INManufacturers:Reliable REL-FCV-L501FMueller A2122-BCla-Val GF50United / PUPCO 8700