How to Install a Sink Drain
Quick Answer
Apply plumber's putty under the drain flange, insert it into the sink hole, tighten the locking nut, and connect the P-trap.
How to troubleshoot How to Install a Sink Drain
Installing a new sink drain requires careful sealing and alignment. This guide covers applying plumber's putty, tightening the drain flange, and connecting the P-trap.
Step-by-Step Fix
- Roll plumber's putty into a rope and place it around the underside of the drain flange.
- Insert the drain flange into the sink drain hole from the top, pressing it down firmly.
- From underneath, screw the locking nut onto the drain flange and hand-tighten, then give it a half-turn with a wrench.
- Attach the tailpiece to the drain flange and connect the P-trap to the tailpiece.
- Slide the P-trap into the wall drain and tighten all slip nuts.
- Run water to test for leaks, tightening nuts slightly if needed.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Leak at the drain flange | Putty not sealing | Remove flange, clean, and reapply fresh putty, tightening more firmly. |
| Leak at slip nuts | Nuts loose or missing washers | Tighten nuts and ensure the plastic washers are seated correctly. |
Frequently Asked Questions
Can I use silicone instead of plumber's putty?
Yes, but putty is recommended for easier removal later.
How tight should the drain flange be?
Hand-tight plus a half-turn with a wrench; do not overtighten.