I was reading the "Idronics, Journal of design innovation for hydronic professionals" by Caleffi. It has a formula for the linear expansion of PEX tubing based on both temperature change and length of tubing. According to the example they use, if you install a 100 feet run of Pex when it is 60 degrees, and it is warmed up to 190 degrees, the PEX will expand in length by 14.7 inches. Is this correct? I have not heard much concerning the expansion of PEX, so my assumption was it was not this significant. They recommend the usage of a flexible expansion compensator. Can anyone give me some input on this?