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The basket strainer is the assembly that seats into your kitchen sink drain — and when it corrodes or its rubber washers harden, it quietly leaks into the cabinet below. As a plumber I find these failures constantly, usually after months of unnoticed water damage. A new strainer is a simple part and a straightforward afternoon swap.
Quick Picks
- Best Overall: Kohler Duostrainer Basket Strainer
- Best Stainless: Ruvati Heavy-Duty Basket Strainer
- Best for a Quick Rental Swap: Everflow Stainless Basket Strainer
Kohler Duostrainer — Best Overall
This is Kohler’s replacement basket for a Duostrainer — a smooth post-style stopper that seats into the Duostrainer body already in your sink and actually seals to hold water. Buy it when the body is fine and only the basket has worn out.
Check the Kohler Duostrainer – Best Overall price on Amazon →
genuine Kohler replacement basket · open/close post stopper · seats into an existing Duostrainer body
- A genuine Kohler part, backed by a one-year limited warranty
- The post stopper opens to strain and closes to hold water
- Trusted Kohler fit and finish
- Overkill if you only need a basic strainer
- Rubber stopper wears over time
- It is the basket alone — it needs a Duostrainer body already in the sink
Verdict: The right buy when a Kohler Duostrainer body is sound and only its basket has gone.
Ruvati Heavy-Duty Strainer — Best Stainless
Thick T-304 stainless that resists rust far better than the chrome-over-zinc units. Great match for a stainless or composite sink.
Check the Ruvati Heavy-Duty Strainer price on Amazon →
304 stainless · deep basket · rust-resistant
- All-stainless resists rust and staining
- Deep basket catches more debris
- Matches a stainless sink
- Costs more than a basic strainer
- Verify it fits your sink opening
- Heavier to handle
Verdict: The match for a quality stainless sink.
Everflow Stainless Strainer — Best for a Quick Rental Swap
It includes the washers and locknut you need. Fine for a rental or a quick fix; just expect to replace it sooner than a heavier-gauge stainless unit.
Check the Everflow Stainless Strainer price on Amazon →
Stainless basket · washers and locknut included · standard 3.5-inch fit
- Stainless steel basket
- Standard fit for a quick swap
- Fine for a rental
- Lighter gauge than premium
- Seal may need a bead of putty
- Basic stopper
Verdict: The complete, quick fix when an old strainer starts leaking.
How to Install a Basket Strainer (Pro Tips)
Disconnect the drain tailpiece, remove the old locknut, and clean the sink opening completely. Roll a rope of plumber’s putty and seat it under the strainer flange (or use the included foam gasket). Press the strainer in, add the rubber and friction washers underneath, and snug the locknut while holding the basket from spinning. Wipe the squeezed-out putty. Replacing the whole sink instead? Start with undermount vs drop-in kitchen sinks.
Bottom Line
The Kohler Duostrainer is the one I’d put in my own kitchen — a tight-sealing stopper and a finish that outlasts chrome-over-zinc units by years.
FAQ
What size is a standard kitchen sink drain?
Standard US kitchen sinks use a 3.5-inch drain opening, which fits a standard basket strainer. Bar/prep sinks are often smaller.
Should I use plumber’s putty or silicone on a basket strainer?
Plumber’s putty for most metal strainers (removable later). Some manufacturers specify silicone for certain finishes — follow the instructions.
Why does my basket strainer leak?
Usually a worn rubber gasket or not enough putty under the flange. Re-seat it with fresh putty and tighten the locknut evenly.
If the leak is the strainer, confirm it first — see kitchen sink leaking underneath to rule out the trap and supply lines.
Related: if the dishwasher backs up into the sink, the cause sits upstream of the strainer — see dishwasher air gap vs high loop.