To expand on my previous message, I really don't know if magenets will
attract ferrour oxide - I've never tried it myself.

Doug Brown wrote:
I don't know if this would work or not but I have to ask what the
purpose or goal of attempting this would be?

New & Improved - N/F John wrote:
What do you think of trying to capture the rust in the boiler by
placing a strong permanent magnet near the boiler drain? Remove the
magnet and then drain.

John