GLPE-040T 4" Galvanized Plain End Pipe is made with zinc in its coating, which prevents corrosion. Common uses for galvanized piping includes transporting potable water and drainage. The path movement of water in pool/spa systems is very important, as it helps keep the water clean and safe to use. Galvanized pipes ensure that the path is secure as they are designed to hold-up against tough environmental factors. Other uses for galvanized piping includes fencing and railings.