One of the great benefits of PEX tubing over copper pipe is it's flexibility, which makes it much less likely to burst in cold climates. If you are installing PEX in a cold climate where this is a concern, it is best to use PEX-a tubing such as AquaPEX (Manufactured by Uponor) because it contracts back down to its original size after expansion. This is the same reason PEX-a tubing is required for use with the ProPEX Expansion system, so that the tubing can return to form and create a secure connection around the fitting after being expanded.
You can find a large selection of PEX tubing, including AquaPEX tubing, at www.supplyhouse.com.
