PVC pipe is a popular choice for plumbing, irrigation, drainage and ventilation, unheated and cold water systems, and more. Lightweight and affordable, you’re just as likely to find PVC pipe in homes and buildings as you are in a plumber’s workshop. Size is the most important factor when purchasing PVC pipe, with 2-inch, 4-inch and 6-inch diameter pipe sizes among the most widely available—though sizes are certainly not limited to these three. You can also choose clear or black PVC pipe, plastic pipe and PVC drain pipe. As long as you’re shopping for PVC pipes, you may want to consider PVC pipe fittings, ball valves, polypropylene fittings and pipe cements and primers.