Short answer
Pull your old stopper first and look at the bottom. A loop or slotted tail means a lift rod pop-up: buy a stopper made for your drain brand and model, or a universal one listed for your drain. A threaded post means a push button drain: replace the cartridge. In a kitchen, a basket stopper must match the strainer brand and size, and a flat rubber plug fits almost anything. If the stopper will not stay up, the fix is usually the pivot nut, not a replacement stopper.
Which stopper do you have?
Start by taking the old one out. The sink stopper removal guide covers every type; most lift rod stoppers come out once you loosen the pivot nut under the sink and pull the pivot rod back (HomeServe). Then look at the bottom of the stopper.
| What you see | Drain type | What to buy |
|---|---|---|
| Loop, hook slot or hole at the bottom | Lift rod pop-up | A stopper for your drain brand and model, or a universal stopper listed for it |
| Threaded post or stem | Push button or lift-and-turn | A replacement cartridge or stopper for that drain |
| Removable basket in a 3-1/2 in hole | Kitchen basket strainer | A basket that matches the strainer brand and size |
| Fixed grate, nothing to lift | Grid drain | A flat rubber or silicone plug |
Stopper types
-
01Surest fit
Lift rod stopper (brand replacement)
Best for: a lift rod drain where you know the brand
- Connects by
- Pivot rod through the tail
- Tail
- Hook slot or hole
- Match
- Drain brand and model
- A hook slot lets the stopper lift out without undoing the pivot rod; a closed hole needs the rod pulled first
- Look for the brand name on the flange or under the sink
- Match the finish to the flange
-
02No brand known
Universal pop-up stopper
Best for: older or unbranded lift rod drains
- Connects by
- Pivot rod or friction fit
- Fit
- Many drain bodies
- Check
- Fit list on the package
- Some are cut to length or adjust to the drain body
- Some skip the pivot rod and sit in the drain by friction, so they work by hand
- Measure the inside of the drain body before you order
-
03Click-clack
Push button cartridge
Best for: a push button stopper that no longer clicks or seals
- Connects by
- Threaded stem
- Fit
- Thread size and length
- Tools
- Usually none
- Unscrew the old cap counterclockwise and thread on the replacement
- Bring the old one when shopping, or measure the thread and cap
- If several do not fit, replace the whole push button drain
-
04Kitchen
Kitchen basket stopper
Best for: a kitchen strainer that no longer holds water
- Opening
- Usually 3-1/2 in
- Action
- Twist, lift or press
- Match
- Strainer brand
- A worn rubber seal on the basket is the usual reason water leaks out
- Some baskets only fit their own strainer body, so check the listing
- Stainless baskets resist corrosion, by most maker descriptions
-
05Fits most
Rubber or silicone plug
Best for: grid drains, odd sizes and a backup for any sink
- Connects by
- Nothing: it lays on top
- Fit
- Wider than the hole
- Tools
- None
- Flat silicone discs seal by suction over most drains
- The only easy way to hold water over a grid drain
- Keep one around while you wait on a replacement part
Stopper will not stay closed or open
This is the most common stopper complaint, and it rarely needs a replacement. On a lift rod drain, the pivot rod goes into the side of the drain pipe through a nut. That pivot nut holds the rod with friction. When it loosens, the rod slips and the stopper drops or will not seal. HomeServe covers the fix in detail.
- Tighten the pivot nut a little by hand. Snug enough to hold the rod in place, not so tight that the lift rod is hard to move.
- Check the clevis strap. The flat bar with holes that connects the lift rod to the pivot rod. If the stopper does not close fully or does not open far enough, squeeze the spring clip and move the pivot rod to another hole in the strap, then test again.
- Clean the stopper. Hair and soap on the stopper can stop it from seating. Lift it out and wipe it.
- Look for drips. A pivot nut that drips usually has a worn washer or gasket behind it. Replace that part, or the pivot rod assembly, to suit your drain.
When to replace the whole drain
If the drain body leaks at the flange, the threads are corroded, or no stopper you try will seal, replace the whole drain. Check the overflow type and hole size first: bathroom sink drains explains both, and the replacement guide walks through the swap. For kitchen strainers, see kitchen sink drains.
Keep it clean
Most stopper trouble starts with hair. Pull and wipe the stopper every few weeks, or add a drop-in hair catcher if your drain allows it: see sink drain strainers.
Questions people ask
Are sink stoppers universal?
Not fully. Universal stoppers are made to fit many lift rod pop-up drains, but drain bodies vary in diameter and in how the pivot rod connects, so check the fit list on the package. A stopper from the same brand as your drain is the surest fit.
How do I know what stopper to buy for my bathroom sink?
Remove the old stopper and look at the bottom. A loop, hook slot or hole that the pivot rod passes through means a lift rod pop-up stopper. A threaded stem means a push button or lift-and-turn stopper. Measure the cap diameter and note any brand name on the drain flange or under the sink.
Why will my sink stopper not stay closed or open?
On a lift rod drain, the pivot nut on the back of the drain pipe may be too loose, so the pivot rod drops. Tighten it slightly by hand until the rod holds its position. Also check that the clevis strap screw is tight and the lift rod is in the right hole in the strap.
What kind of stopper does a kitchen sink use?
Kitchen sinks with a basket strainer use a basket stopper that twists, lifts or presses to seal. Replacement baskets need to match the strainer body, usually a 3-1/2 inch opening. A flat rubber or silicone plug works as a universal backup on most drains.
Can I replace just the stopper and keep the drain?
Yes, as long as the drain body is sound and not leaking. Lift rod stoppers lift out once the pivot rod is pulled, and push button stoppers unscrew. If the drain body is corroded or leaking at the flange, replace the whole drain instead.
Sources
Last reviewed October 12, 2026. Parts, sizes and listings change; check the product details before you buy, and follow the maker’s instructions.