Bronze threaded fittings are manufactured from smooth-cored castings, designed to provide full flow with minimum restriction. All fittings are tested underwater to ensure quality. Bronze provides a tighter seal and is easier to install than other metals. Uses: water, plumbing, heating, pneumatic and marine applications. Bronze resists the harmful effects of corrosion when coming into contact with salt water or fresh water polluted with mineral acids or peaty soils. Available in the following NPT sizes: 1 in, 1-1/4 in, 1-1/2 in, and 2 in.