Just curious, why wouldn't PEX be approved in Chicago or anywhere else for that matter? I's it real or memorex as the ad used to say. Is it some local phenomenon or just ignorance / politics?????
My belief in this is that it's a combination of a few things, part "this is the way we have always done it", part lack of an enforceable "national" code and part "Inspectors always right" so you have him/her as the final say.
I guess you could argue for days the pros and cons of copper over PEX, copper is a naturally occurring material, not produced from petroleum, gives off trace amounts of good minerals, not trace amounts petrochemicals, PEX however handles freezing better, is cheaper to install, has much more flexibility in installation. Yes PEX is DIY easier, but I've seen some disastrous PEX installations that defies even poor logic.
I work across 4 different counties and numerous city jurisdictions as a GC and I see interpretations of national codes vary greatly, the national code says PEX is approved, Chicago code says it's not, one county around me insists that the stub outs are to be copper not elbowed PEX, no reason, just that's the way "they" want it, even know a plumber that says he likes it that way because it makes the job "look" like it's all copper.
Just curious, why wouldn't PEX be approved in Chicago or anywhere else for that matter? I's it real or memorex as the ad used to say. Is it some local phenomenon or just ignorance / politics?????
Yes, that is correct. Short pieces with 2 - 7" between the metal connectors are prone to failure as an ice plug forms at the connectors then the freezing moves inward. The short piece does not have enough expansion to absorb the expansion of the water freezing.
There is also a type of PEX that has a layer of aluminum in it and this type does not fair well when frozen either.
Pex is prone to fail due to freezing when used in shot pieces because they just can't expand enough before it hits a fitting. That said pex is all I use in Western Alaska because it will take so much abuse with freezing, but remember we arn't supose to freeze our pipes. Pex just helps when you do.
Leave a comment: