Step 6 · Replace Worn Gaskets or Seals
If tightening connections did not stop the leak, inspect rubber gaskets and O-rings around the faucet base, drain assembly, and pipe connections. Carefully remove the old gasket or seal, noting its position and orientation. Install a new, appropriately sized gasket or seal. For faucet base leaks, this may involve removing the faucet assembly. For drain leaks, it might mean disassembling parts of the drain pipe.