Step 7 · Tighten Couplings and Test the Repair

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

Using a nut driver or, preferably, a torque wrench set to the manufacturer's specification (usually 60 inch-pounds, often printed on the stainless steel band), tighten the clamps on both couplings. Tighten the screws on each band evenly, alternating between them if there are multiple, to ensure even pressure. The band should cinch down firmly. Once both couplings are fully tightened, it's time to test. Go to an upstairs fixture and run a significant amount of water (e.g., flush a toilet a few times, run a sink for a minute). While the water is running, use a flashlight to carefully inspect the top and bottom of both couplings for any sign of dripping or leaking.