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Trying to save a bit, doing a reno on my house copper water water system but closed radiant heat and also a pex sprinkler.off the potable i need some temp heat and could save if i used non oxygen barrier left off the sprinkler roll since as i bring each floor onto new system i only need the old boiler to last through this season and maybe one more will it rust that quick?
alternatively i could do the sprinkler system in thermapex rather than aquapex but its not potable rated is it really much different i could use back flow preventive etc but defeats savings