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Title: Does not dissolve.
Review: Used these in a recent plumbing repair. It blocked the water during sweating the pipe, but clogged a faucet when the water was turned on, it broke but did not dissolve, and was lodged in the 1/4 supply line to the kitchen faucet. I left another one in water over night - it did not dissolve, was still a large piece of plastic jelly. Use the old plumber's trick instead - balled up white bread, it will dissolve in the water system.
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