Pipe and Tubing in the Pipe and Tubing sub-category in the Plumbing category from GoVets is the perfect place to find the supplies you need to complete your project. Dielectric Pipe Nipples are a type of pipe fitting used to connect two pipes together. They are made of a dielectric material, which is a non-conductive material that prevents electrical current from passing through it. Dielectric Pipe Nipples are used in a variety of applications, including water, gas, and oil lines. Shop today for the supplies you need to complete your project.