... Blue Grey Note: We normally only have natural color tank in stock. Blue and grey color need to be custom made. ... diaphragm valve, backwash valve, fleck valve, Runxin valve, Fobrite valve, FRP and stainless steel membrane housing, PVC bag filter, PVC cartridge ... valve, backwash valve, fleck valve, Runxin valve, Fobrite valve, FRP and stainless steel membrane housing, PVC bag filter, PVC cartridge ...