In contrast to galvanized steel, copper or cast-iron pipes that require soldering smaller parts in order for them to transport water properly from each fixture in a house, cross-linked polyethylene plumbing only needs the right “fittings” to fasten it to your home’s water supply. These fittings connect PEX piping using different methods, including push-fit, crimp, and thermal expansion. Regardless of the method, these fittings are designed to eliminate leaks, save you time and money, and ensure your new piping system operates correctly.
The two most common types of PEX tubing are called PEX-A and PEX-B. They are both extruded from high-density polyethylene and have different degrees of cross-linking. But they have identical maximum temperature, pressure, and kinking resistance ratings. PEX-A is the most flexible of all the PEX varieties and is easier to cut, expand, and repair compared to the other types. It also has a lower rate of chemical leaching and can handle higher water temperatures.
PEX-B, on the other hand, has a slightly lower temperature rating and a higher pressure rating than PEX-A. It also has a slightly lower kinking resistance. However, it has been in use for over 40 years with few known issues and is significantly cheaper than PEX-A.
The fastest way to connect PEX is to use push-fit connections. These are special push to connect fittings that grab the end of a PEX tube when inserted over it (view on Amazon). You don’t need any tools to implement these, although a specific removal ring is required to take them off once you have connected them. pex tubing