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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 under $20 and a straightforward afternoon swap.
Quick Picks
- Best Overall: Kohler Duostrainer Basket Strainer
- Best Stainless: Ruvati Heavy-Duty Basket Strainer
- Best Budget: Everflow Stainless Basket Strainer
Kohler Duostrainer — Best Overall
A genuinely well-made strainer with a smooth post-style stopper that actually seals to hold water. The finish lasts and the basket doesn’t rattle. Worth the small premium for a part you touch every day.
Solid brass body · post-style basket · twist-to-seal
- Solid brass resists corrosion for years
- Post basket strains and seals with a twist
- Trusted Kohler fit and finish
- Pricier than budget strainers
- Rubber stopper wears over time
- Fits the standard 3.5-inch sink opening only
Verdict: The seal-and-forget strainer for most kitchen sinks.
Ruvati Heavy-Duty Strainer — Best Stainless
Thick T-304 stainless that resists rust far better than the chrome-over-zinc budget units. Great match for a stainless or composite sink.
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 Budget
Under $12 and includes the washers and locknut you need. Fine for a rental or a quick fix; just expect to replace it sooner than a stainless unit.
Stainless basket · low cost · standard 3.5-inch fit
- Stainless basket at a budget price
- 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 economical 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.
FAQ
Putty or silicone? Plumber’s putty under the flange is traditional and easy to service later. Avoid silicone on the flange — it makes future removal miserable.
Will any strainer fit my sink? Standard kitchen sink openings are 3-1/2″. Bar and prep sinks may differ — measure first.
Why does mine leak? Almost always hardened washers or failed putty under the flange. A full strainer replacement is the reliable fix.
Bottom Line
The Kohler Duostrainer is the one I’d put in my own kitchen — a tight-sealing stopper and a finish that outlasts the cheap 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.
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