Why most People prefex PEX Tubing over Copper - there is a less risk of leaks with PEX Tubing. PEX doesn't degrade like copper, higher PSI rating freezing pipes will still burst, but PEX will be able to handle more freezing water than copper. ... PEX plumbing installations require fewer fittings than rigid piping.

Is PEX really better than copper?

Copper Pipe Lifespan. PEX pipe is not only cheaper than copper but more durable too. PEX is immune to corrosion and mineral build-up, and it's not affected by electrolysis, which can cause small pinhole leaks in copper piping. ... PEX pipe is more resistant to bursting in freezing conditions than metal piping.

Why is PEX plumbing bad?

Potential chemical leaching is another downside of PEX piping. Due to its chemical composition, the PEX pipe material may leach toxic chemicals including bisphenol (BPA), MTBE, tertiary butyl alcohol (TBA), and others.