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Slotted or unslotted — get this wrong and it leaks

The best pop-up sink drains for 2026

The drain is a ten-dollar part that decides whether the cabinet under your sink stays dry, and there is exactly one way to get it badly wrong: slotted versus unslotted. A sink with an overflow needs a slotted drain, whose side opening lets the overflow channel drain; a sink without one needs an unslotted drain, which is sealed. Fit a slotted drain to a sink with no overflow and water finds the slot on its way past the seal. The two are visually near-identical in listings, so it is worth reading the word rather than the picture. After that, the mechanism: click-clack (push to open, push to close) has no linkage under the sink and is what most people want; pop-up with a rod needs a faucet that has the lifting rod to drive it. Check the height under the sink, because a tall click-clack body plus a bottle trap can foul a shallow vanity. We compare thread size, slotted or unslotted, operating mechanism, overall height under the sink, and material and finish.

By

The models we recommend

  1. UXELY pop-up drain bolt assembly

    Anti-rust sink pop-up slotted bolt assembly in high quality brass, described in the maker’s own specification as copper, with an M8 top thread and an M16 x 1.5 bottom thread, a popped-up height of 1.52 in (38.5 mm), a closed height of 1.10 in (28 mm) and an overall height of 2.30 in (58.3 mm); a spring mechanism with a screw thread push action, supplied as one piece in gold, as a replacement for most bathroom and bathtub sink drain stoppers

    A brass pop-up bolt assembly with M8 and M16 x 1.5 threads, for replacing a click-clack mechanism.

    Best for: A click-clack drain whose button has stopped springing — the cheapest possible fix

    ≈ $8

    Check price on Amazon Read the review: UXELY pop-up drain bolt assembly

  3. FASTROHY click-clack drain plug tops

    Pack of two chrome sink drain push button click clack plug tops in high quality zinc alloy, intended as a replacement pop up click clack plug top; the title states 2.60 in (66 mm) and the bullets state a chrome plug diameter of 2.56 in (65 mm) with a screw hole diameter of 0.31 in (8 mm), and the maker advises measuring before choosing

    A pair of chrome click-clack plug tops in zinc alloy, with an 0.31 in (8 mm) screw hole.

    Best for: A cracked or pitted click-clack cap, where two for nine dollars means one spare in the drawer

    ≈ $10

    Check price on Amazon Read the review: FASTROHY click-clack drain plug tops

For which need, in pop-up sink drains

Screwing into the sink

Thread size decides compatibility with the sink's drain hole.

Kraus PU-11SFS

Matching the drain to the rest

The stated material and finish are the manufacturer's. This site publishes them without judging their durability.

Tong Gu 226-530

For whom, within pop-up sink drains

Opening with a finger
The published operating mechanism describes how it opens: push, lift rod or free flap.
Matching the tapware
Published material and finish decide the match with the faucet already fitted.
A low unit
Published height under the sink decides the room left for the trap and for storage.

What each advantage costs, on pop-up sink drains

Slotted against unslotted
The published note must match the sink. An unslotted drain on a sink with an overflow blocks it.
Push mechanism against simplicity
The published operating mechanism adds moving parts in the water.
Finish against upkeep
Published material and finish decide what shows marks. This site compares no upkeep.

Before buying pop-up sink drains

What is a slotted drain?

A drain with a slot letting the overflow water through. The note is published on every listing.

How do I know which one I need?

If the sink has an overflow, a slotted drain is needed. The overflow note appears on the sink's listing.

What drain thread size?

The published size must match the drain hole. It is given in inches or millimeters.

What does the operating mechanism describe?

How the plug opens and closes, published by the manufacturer.

How much room under the sink?

Published height under the sink says so. It is read with the trap planned.

Which finish should be chosen?

Published material and finish are the manufacturer's. This site recommends none.

Does the drain come apart for cleaning?

That depends on the published mechanism. This site describes no operation.

Is sealing compound needed?

This site publishes drain specifications and describes no installation.

What to remember about pop-up sink drains

The slotted-or-unslotted note is the only one that makes a drain compatible or useless, thread size decides the screwing, and height under the sink decides what still fits below.

A quick look at pop-up sink drains

  • Most affordable here: Tong Gu 226-530, at $8.
  • Height under the sink: 1.1 to 85 /8 in overall, on 4 of the 6 models.

Pop-up sink drains in one table

The table keeps only the dimensions given by four products in five. Below that threshold, a column measures missing data rather than the product.

ModelPriceOperating mechanismThread sizeMaterial and finish
Tong Gu 226-530$8NONE — it is a cap, driven by the bolt you supply.A nominal 1/3 in (8 mm) screw — the M8 standard — stated to fit a standard M8 pop up plug bolt. THE VISIBLE CAP ONLY, and the maker states explicitly that THE BOLT IS NOT INCLUDED. One piece at $7.99 on October 29, 2026, against $4.83 each for the zinc alloy pair on this shelf. 2.6 in / 66 mm diameter, 2.60 × 2.60 × 2.60 in (66 × 66 × 66 mm).Silver on HIGH-QUALITY BRASS — the only brass cap on this shelf. No weight and no warranty are published. The maker undertakes to reply within 24 hours.
UXELY PopUp Slotted Bolt Assembly$8A spring mechanism with a screw thread push.M8 at the top, M16 × 1.5 at the bottom — THE BOLT AND SPRING MECHANISM ONLY, and THE CAP IS NOT INCLUDED. One piece, 1.77 × 0.59 × 0.59 in (45 × 15 × 15 mm).Gold, and the bolt is normally hidden under the cap. THE MATERIAL IS PUBLISHED TWO WAYS: brass in the bullets, COPPER in the maker's own specification list — and they are not the same metal. Neither a weight nor a warranty is published.
ALI2 SYLHUS0311$10Push to close and seal, push again to open and drain. The maker states it collects hair neatly and prevents it clogging.M8 at the top, M16 × 1.5 at the bottom — the same two threads as the UXELY bolt on this shelf. THE BOLT AND SPRING MECHANISM ONLY, cap not included. Two pieces at $5.00 each.THE MATERIAL IS PUBLISHED TWO WAYS, as on the UXELY bolt: brass in the bullets, COPPER in the maker's own specification. 1.2 oz (34 g) for two, 0.6 oz (17 g) each — half the weight of the UXELY, for the same two threads. No warranty is published.
FASTROHY Basin Waste Pop Up Plug$10NONE — it is a cap, pushed by whatever bolt you already have.An 0.31 in (8 mm) screw hole, which is the M8 standard on this shelf — THE VISIBLE CAP ONLY, with NO MECHANISM INSIDE and no bolt included. Two pieces at $4.83 each. The diameter is published TWO WAYS: 2.60 in (66 mm) in the title and 2.56 in (65 mm) in the bullets. The maker's own advice is to measure your size before choosing. Five published bullets, two of which repeat each other.Chrome on HIGH QUALITY ZINC ALLOY — NOT BRASS, where three other parts on this shelf are brass, and zinc alloy is the one metal here that will not take years of standing water. 2.4 oz (68 g) for two, 1.2 oz (34 g) each. No warranty is published.
Kraus PU-11SFS$35Spring-loaded, WITH NO LIFT ROD REQUIRED.A 1 1/4 IN TAILPIECE CONNECTION, suiting a 1 3/4 in drain opening with standard US plumbing — A COMPLETE ASSEMBLY: body, tailpiece and stopper, with all rubber gaskets included. Cap diameter 2 5/8 in, about 2.63 in (66.7 mm). Stated for Kraus sink and undermount sinks, including the Elavo Ceramic series.A metal body and tailpiece in SPOT-FREE STAINLESS STEEL, resisting water spots and fingerprints, available in a range of corrosion-resistant finishes. 14.4 oz (408 g). WARRANTY 1 YEAR LIMITED — the only warranty published among the parts on this shelf. No abrasive chemicals or cleaners.
Kohler K-33151-CP$100A clicker — push to close, push to open.1-1/4 in (32 mm) connection — a complete clicker drain assembly. 2.20 × 2.20 × 8.50 in (56 × 56 × 216 mm) as listed. Four published bullets. NEITHER THE OVERALL LENGTH, NOR THE CAP DIAMETER, NOR THE DRAIN OPENING IT SUITS is published, where Kraus on this shelf gives all three.Polished chrome on premium metal, stated to resist corrosion and tarnishing, with a brass tailpiece per the description. GASKETS ARE NOT STATED AS INCLUDED, where Kraus includes all of them. No weight and no warranty are published on this listing.

What each budget reaches here

Lower range

$8 – $8

2 models

Tong Gu 226-530, UXELY PopUp Slotted Bolt Assembly

Mid range

$10 – $10

2 models

ALI2 SYLHUS0311, FASTROHY Basin Waste Pop Up Plug

Upper range

$35 – $100

2 models

Kraus PU-11SFS, Kohler K-33151-CP

Also worth reading on pop-up sink drains

What we read, and how we rank

Specifications: manufacturer sheets for bathroom fittings and the matching Amazon product pages. Prices and availability: Keepa. Every figure in this table names its source.

Most recent revision in this category: October 29, 2026.

How we assess pop-up sink drains

Prices quoted in these summaries are dated readings. The live price is shown next to each product.