this post was submitted on 03 Jan 2024
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What is this on my apartment hydronic baseboard heater? (sh.itjust.works)
submitted 1 year ago by SoySaucePrinterInk@sh.itjust.works to c/homeimprovement@lemmy.world
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[–] ikidd@lemmy.world 1 points 1 year ago

It'll pick up some copper oxidation on brass fittings.