These fittings are meant to provide strong and dependable connections for a variety of piping units and to withstand the rigors of demanding environments. The black malleable iron fittings are perfect for gas and oil applications, although the galvanized iron fittings are great for non-potable water and outside use because https://messiahbrfvj.blog-ezine.com/38854768/the-ultimate-guide-to-jianzhi