The NIBCO® lead-free* push-to-connect pressure coupling is used in residential and commercial systems such as potable water, non-potable water and hydronic systems.ues, and the personal relationships we build. When performance matters to you, your satisfaction matters to us. When you choose NIBCO, you get more than innovative product solutions that meet the most exacting standards. It’s about a name you can trust, the people behind the product, our manufacturing expertise, the latest in laser technology, our guiding core values, and the personal relationships we build. When performance matters to you, your satisfaction matters to us.