Just sent an e-mail to Zurn about what kind of brass they use for their pex fittings. Apparently they have switched to C87850 "Eco Brass". This alloy is no more than 22.36% zinc which pretty much rules out dezincification in all but the most corrosive waters.
"We are using a C69300 alloy known as EcoBrass due to California low lead requirements (which subsequently as expected, has already begun moving throughout the country with the introduction of a national low lead bill) and changes to NSF Standard 14 that add corrosion testing requirements that will take effect in the beginning of 2011.
Please let us know if you need additional information.
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