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j-random t1_j6av7j8 wrote on January 29, 2023 at 12:34 AM

Reply to comment by protolalia in What is the next step for replacing broken pipe under kitchen sink? by protolalia

You should get some penetrating oil. PB B'laster is one, Kroil is another brand. Spray that on the threads and leave it for an hour or so. They will work their way into the threads by capillary attraction and lubricate the stuck parts.