Quick Answer:
If you can push the stopper down but it springs right back up, the pop-up linkage is out of position or binding. The usual fix is to adjust the clevis strap so the stopper has the right amount of travel. Test and tweak the strap position from under the sink until the stopper stays down when you push it.
Why This Happens
- Clevis strap set at the wrong hole or angle, so the stopper can’t travel fully into the closed position.
- Pivot rod, spring, or retaining clip is loose, bent, or corroded and returns too quickly.
- Debris or mineral buildup around the stopper or seat causes uneven motion or early pop-up.
- Recent work on the drain can bend or misalign parts—check for Linkage bent after repair.
- Cleaning or reassembly sometimes leaves the mechanism sticky—see Pop-up jammed after cleaning.
Step-by-Step What to Do
1. Prepare and look
- Put a small bucket or towel under the drain to catch drips and parts.
- From above, push the stopper down and watch how it sits. From below, have someone operate the lift rod while you watch the linkage.
2. Identify which part is returning too quickly
- Observe the clevis strap (the slotted flat bar with multiple holes), the pivot rod, and the spring clip. If the strap is in the wrong hole the pivot action is wrong and the stopper won’t stay down.
3. Adjust the clevis strap position
- Loosen the wing nut or fastener that holds the clevis strap to the lift rod assembly enough to move the strap.
- Slide the clevis strap to a different hole—moving it so the connecting pin sits in a hole that gives the stopper more downward travel. Usually you move it one hole toward the sink to give more down travel, then test.
- Tighten the nut so the strap is secure but not so tight it binds the movement. Test the stopper several times until it stays down reliably.
- If the strap is bent or the holes are worn, plan to replace the strap or the assembly.
4. Check and adjust the pivot rod and clip
- Make sure the retaining clip that holds the pivot rod is in the correct position and not too close to the drain tailpiece; it should allow the rod to move smoothly.
- If the rod is bent or corroded, replace it so the motion is straight and consistent.
5. Clean and re-test
- Remove any hair, gunk, or mineral scale around the stopper and seat. Work the stopper mechanism a few times to seat it properly.
- Reassemble, run water and operate the lift rod to confirm the stopper stays down and seals when closed.
6. Replace worn parts if necessary
- If adjustments don’t work because parts are stripped, bent, or corroded, replace the clevis strap, pivot rod, or entire pop-up assembly for a reliable fix.
What Not to Do
- Do not accept a pop-up that pops up immediately—adjustment is usually needed.
- Do not force parts into position or use glue to hold moving parts; the mechanism needs free movement.
- Do not cut the clevis strap to shorten travel; that weakens it and can cause failure.
- Do not rely on chemical drain cleaners to fix sticky mechanical troubles; they won’t correct alignment issues and can damage finishes and seals.
When to Call a Professional
- The linkage is badly bent, the strap holes are stripped, or metal parts are corroded and won’t hold adjustments.
- There’s a leak at the drain or tailpiece while you work on the pop-up and you can’t stop it.
- You tried adjusting and replacing simple parts but the stopper still won’t seat or stays loose—there may be deeper alignment, seat, or tailpiece issues.
Safety Notes
- Wear gloves to protect hands from sharp metal and gritty deposits. Eye protection is a good idea when working under the sink.
- Place a bucket or towel under the work area to catch water and small parts. Work on a flat, stable surface.
- Avoid chemical drain cleaners while handling the pop-up parts—these chemicals can splash and irritate skin or eyes.
Common Homeowner Questions
- Why does the stopper move when I tug the lift rod? Short travel or wrong clevis hole placement transmits too much lift; move the clevis strap to the correct hole.
- Will replacing the pop-up assembly fix repeated popping? Yes, replacing worn or bent parts usually solves repeated or inconsistent popping.
- Can I fix this without tools? Basic adjustments often need nothing more than your hands, but a pair of pliers and a flashlight make it much easier and more reliable.