J trap, leaking at nut

Removed the trap to retrieve something that went down the drain. When reattacing the j-trap, leaks from the lower nut on the wall side (not the nut closest to the wall). Have undone & redone 5 times... Still a slow leak.

Water leaks from the toilet supply line coupling nut attached to the shut-off valve. I inspected the nut and the red rubber washer looks crushed and worn out. Do I replace the washer or should I just buy a new supply line?

Hello All, I am putting a ceiling in an unfinished room below my master bath, but we have a leak from the shower above. I am trying to loosen the bottom nut (already disassembled the top side) but the whole drain is turning. Any ideas how I can break this loose? Thank You, Josh

I have just installed vessel lavatories in new bathroom. There is no problem with draining, but despite tightening I have leaks from the trap compression nuts and where the tailpiece goes into the extension. Water seems to flow down while faucet is running but shortly thereafter, it appears at...

OK - I have attached pictures to this because I have no idea of the terms I am about to throw around, and if any of them are correct. We recently purchased an older victorian, and the downstairs bath does not look like it has been renovated in the last 15 to 20 years. It is in decent shape,...