There are made from different materials for a bibcock. 1. plastic 2.Zinc alloy.3 steel 4,stainless steel 5.Brass materials. As the world population continues to grow, so does the demand for fresh water. It's estimated that by 2025 approximately two-thirds of the world's population will live in areas with a shortage of fresh water. This has led to a renewed interest in recycling wastewater and finding new ways to use less fresh water. One innovation that is helping to meet this challenge is the water bibcock. It (a tap connector with an outlet angle perpendicular to the spout) have been around since at least the 18th century, but they've only recently been subjected to scrutiny as a tool for reducing consumption of potable water.