Simple past tense and past participle of plumb.(verb)
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Use "plumbed" in a sentence
"Over time, as "plumbed" ice forms on land and flows down to the sea, the ice shelf could regrow."
"While I don't have your problems, I was thinking of trying second home network myself for other reasons and I'm interested in how you "plumbed" your setup."
"His books should have been plumbed for all the anti-American statements, and they should have been broadcast as often as possible."