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Cast iron and non O2 barrier piping. Should I replace the pumps now?
I recently purchased a home with radiant floor heating. I don't know much about these systems except what I've been reading on these forums and online elsewhere.
Summary of the system: Navien boiler, Taco multi zone control module, Wilo *cast iron* pumps, Taco *cast iron* Vortech Air Separator. I have 3 zones in the house, one for each floor.
I can see the pex piping which are the loops for the bottom floor. These are the red pipes in the lower left corner of the photo. They are labeled Bluefin Rifeng and say they have an oxygen barrier.
There are 2 gray pex supply pipes going to the 2nd and 3rd floors, and 2 gray pex return pipes from those floors. Those pipes are labeled Uponor AquaPex. From my research, it sounds like these do not have an oxygen barrier. So what is the right thing to do at this point?
1. Do nothing and wait for something to go wrong?
2. Replace the pumps and air separate with non cast iron versions?
3. Something else?
Thank you so much for the help.