Anti-rust additive for steam boilers — Heating Help:
2015-7-27 · Before using it, my water was always nasty rusty brown. While using the Steamaster, my water is always purple and I get a small amount of rust out of the rear section by the return line, likely from the rest of the system when I clean the boiler out in the spring. I'll never run a steam boiler with water alone again.
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