Sodium Hypochlorite (bleach) is widely used for bleaching purposes, and to treat water and wastewater. Since the use of elemental chlorine is being increasingly restricted by regulatory agencies, one of the prime substitutes is bleach. There are few traditional materials that are able to withstand the corrosive effects of bleach service, especially at a
reasonable cost. This paper reviews the basic chemistry of bleach manufacturing and its ultimate decomposition back to salt water, and also presents the pro's and con's of various piping materials. Finally, it introduces a new piping material for consideration in bleach service, poly Dicyclopentadiene (DCPD).