best way to deal with poly-b pipes?

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Is it true that polybutylene pipes cause oxygen to go into the plumbing system and rust out various components over time? I have polyb pipes for my radiant floor heating. Could that explain why I often have my pumps and boilers fail within years instead of decades?
 

Helper Dave

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We don't really deal with it in my area at all, but I've read that earlier versions of poly b were very oxygen permeable.

That could cause your problems. Or the scaling, and flaking off of material inside the pipe could be wrecking your systems.

Either way, it's a bigger problem just waiting to happen (massive leaks).
 

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How would the plumber test for scaling, do they cut the pipes open to check? I read about pouring vinegar into the hot water tank to descale.

For poly-b problems, I have read about these options:
1) replace all polyb pipes
2) add a heat exchanger, a backflow preventer, and add chemicals (?) to system
3) use only non-rusting components: boiler, expansion tank, air scoop, pump, pipes
4) add "water treatment" and test it often (is that the same as "adding chemicals"?)

Which option would you guys recommend? I understand that replacing the pipes may become necessary -- how much roughly should it cost to re-pipe with say PEX for a 4000 sqft 2-floor house for radiant floor heating?
 
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