water pump housing, investment casting, OEM service, custom fabrication cast steel CD4 price advantage Detailed Description: 1.Product name:Casting pump parts; water pump housing 2.Material:cast steel; cast iron, CD4 3.Technology:investment casting, CNC machining 4.Certification:ISO 9001:2008;5.OEM service, custom fabrication centrifugal CD4 pump housing, water pump housing