1-1/2 Inch Polyethylene Tubing, 300 Foot Roll - Black Color. The tubing has a 1-1/2 Inch nominal size and comes in a 300 foot roll which is great for larger applications that require a long distance of tubing. It is important to note that this tubing will use 1-1/2 inch PEX/Poly fittings such as, Barbed or Compression connection fittings. This Black Poly Tubing is great for a wide variety of plumbing, irrigation and waste disposal applications. Poly Pipe, which stands for “Polyethylene”, has become an alternative to the classic plumbing pipes including Copper, PVC and CPVC. The main advantage to working with poly tube is that it easy moldable, especially for tight areas where there just isn’t room for multiple pipe fitting to get the tubing from point A to B, but still provides incredible durability and strength. Potable water distribution and sprinkler systems are two of the most popular applications for poly tube and help to save time and effort while still getting the same durability and reliability out of your water systems.