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Vent Corrosion

Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,523
edited September 2022 in THE MAIN WALL
I see this so often on plumbing vents, always in the kitchen. The deterioration is from the inside, out and the pipe is filled with the sloughed off material.

Does anyone know why this happens? Electrolysis?


8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

Two btu per sq ft for degree difference for a slab

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 26,234
    This is a bit of a WAG, but I'd think it was because the inside of that vent is always wet or perhaps better said damp, with just enough air flow for a continuous supply of oxygen, and likely with some interesting acids in the "air" as well. Not a friendly environment.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Alan (California Radiant) Forbes

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