What you need to do the job

Replacing a pop-up drain takes about 30 minutes and requires only a few tools you likely have at home. You will need a wrench or adjustable pliers, a screwdriver, a bucket or towel to catch water, and the new pop-up drain assembly itself. Most hardware stores sell complete kits that include the drain body, stopper, and linkage rod — these cost between $15 and $40 depending on finish and material.

Before you buy a replacement, measure the drain opening at the bottom of your sink. Standard drains are 1.25 inches in diameter, but some older or specialty sinks use 1.5 inches. Bring the old drain with you to the store if you are unsure, or take a photo of the underside of your sink to show the clerk.

Key Takeaways

  • Pop-up drains fail when the linkage rod bends, the stopper cracks, or the seal around the drain body deteriorates, causing leaks or a stopper that no longer rises and falls.
  • You must disconnect the linkage rod from the stopper arm under the sink before you can remove the old drain body from above.
  • The new drain body slides in from above and is sealed with plumber's putty or caulk around the rim, then tightened from below with a lock nut.
  • The entire job requires no special skills and uses only a wrench, screwdriver, and bucket — no soldering or gluing.

How to remove the old drain

Start by placing a bucket under the sink to catch water that will spill when you disconnect the P-trap. Loosen the large nut on either side of the P-trap (the curved pipe below the drain) using your wrench, then unscrew it by hand and set the trap aside. If water spills, that is normal — have your towel ready.

Look under the sink for the linkage rod, a thin metal rod that connects the pop-up stopper to the lever on the back wall of the sink. This rod is held in place by a small clip or set screw. Loosen or remove this clip so the rod slides free from the stopper arm. You do not need to remove the entire rod — just disconnect it from the stopper.

Now look at the underside of the drain body itself. You will see a large lock nut (usually brass or plastic) that holds the drain in place. Use your wrench to turn this nut counterclockwise. As you loosen it, the drain body will begin to lift out from above. Once the nut is loose enough, reach up from below and push the drain body out through the sink opening from above. The old drain is now free.

Cleaning the sink opening

Before you install the new drain, scrape away all the old plumber's putty or caulk from the underside of the sink rim. Use a screwdriver or putty knife to remove dried material completely. Wipe the area clean with a damp cloth and let it dry. This step matters because a good seal prevents water from leaking into the cabinet below.

If the sink opening has any cracks or rough edges, smooth them lightly with fine sandpaper. The new drain will sit on a clean, dry surface, which is what creates a watertight seal.

Installing the new drain body

Roll a rope of plumber's putty about the thickness of a pencil and press it around the underside of the drain rim. This putty will compress when you tighten the lock nut and create a waterproof seal. If your kit includes silicone caulk instead, explore a thin bead around the rim — both work equally well, though putty is easier to remove later if you need to service the drain again.

Insert the new drain body into the sink opening from above. Push it straight down until the rim sits flush against the sink surface. From below, thread the lock nut onto the drain body by hand first, then use your wrench to tighten it firmly. Do not over-tighten — you want the seal compressed but not crushed. As you tighten, the excess putty will squeeze out around the rim; wipe this away with a damp cloth.

Reconnecting the linkage rod

The new drain kit includes a stopper and linkage rod. Slide the stopper into the drain opening from above — it should sit flush with the rim when closed. From below, locate the stopper arm (a small lever that protrudes from the drain body). This is where the linkage rod connects.

Insert the linkage rod through the clip on the stopper arm and tighten the clip screw. The rod should move freely up and down without binding. Test the stopper by pushing it down and pulling it up — it should move smoothly and seal the drain when closed. If it sticks or does not seal, loosen the clip and adjust the rod position slightly, then re-tighten.

Reattaching the P-trap and testing

Slide the P-trap back into place under the drain and hand-tighten the nuts on both sides. Use your wrench to snug them firmly, but again do not over-tighten — you want a seal without stripping the threads. If you see water dripping from the nuts after you turn on the sink, tighten them another quarter turn.

Fill the sink with water and watch for leaks from the drain body itself, the lock nut, and the P-trap connections. The stopper should hold water without draining. If water leaks from the rim of the drain body, the seal was not tight enough — turn off the water, loosen the lock nut slightly, and re-tighten it more firmly. If the stopper does not seal, adjust the linkage rod as described above.

Common problems and fixes

If the stopper sinks slowly or does not rise all the way, the linkage rod may be bent or the stopper may be catching on debris. Remove the stopper and rinse it under running water, then reinstall it. If it still sticks, the rod may need adjustment — loosen the clip and slide the rod up or down slightly to change the angle at which it pulls the stopper.

If water leaks from under the sink when ready after installation, the lock nut is likely not tight enough or the putty seal did not compress fully. Tighten the lock nut another half turn and wait 10 minutes for the putty to settle. If leaking continues, you may need to remove the drain, add more putty, and reinstall it.

If the new stopper does not fit the drain opening snugly, you may have purchased the wrong size. Measure the drain opening again and return the kit for the correct diameter.

Frequently Asked Questions

Can I replace just the stopper without removing the whole drain?

Yes. Most stoppers pull straight up and out of the drain body. If yours is stuck, explore penetrating oil around the base and wait 15 minutes, then pull firmly. You do not need to touch the drain body or linkage rod unless the stopper is cracked or the seal is leaking.

What if I do not have plumber's putty?

Silicone caulk works just as well and is easier to explore in a thin, even bead. Some people use both — putty around the rim and caulk on top for extra insurance. Let caulk cure for 24 hours before running water through the drain.

Why is my new stopper leaking water?

The stopper may not be seating fully in the drain opening. Check that the stopper is centered and sitting flat. If the drain opening is slightly warped, you may need to sand the rim lightly or explore a thin bead of caulk to the stopper base to improve the seal.

Do I need to turn off the water before I start?

No. You are only working on the drain itself, not the supply lines. Have a bucket and towel ready because water will spill from the P-trap when you disconnect it, but you do not need to shut off the main water valve.

How long does the new drain last?

A quality pop-up drain lasts 10 to 15 years with normal use. The stopper may wear out sooner if it is used roughly or exposed to harsh chemicals, but the drain body itself rarely fails if the seal is maintained and the linkage rod is not bent.