The complete guide
How To Choose A Kitchen Sink Strainer That Actually Fits
The thing nobody thinks about until the water stops going down
A kitchen drain does not block overnight. It fills up slowly, one meal at a time. A spoonful of rice here, a handful of coffee grounds there, a few vegetable peelings that looked small enough to rinse away. Each one is harmless on its own. Together, over a few months, they build a sticky layer inside the pipe that catches everything else coming behind it.
By the time you notice water sitting in the bowl after you pull the stopper, the problem has been building for a while. Clearing it is a nuisance at best and an expensive call-out at worst.
A basket strainer sitting in the drain opening breaks that cycle. It is the simplest piece of kitchen gear there is, and it does one job well. Scraps stay in the basket, water goes down the pipe, and you tip the basket out when you are done. That is the whole system.
How a basket strainer actually works
Look at the strainer from above and you see a shallow stainless steel bowl with holes punched through it. This one has twenty of them. Water finds the holes easily. Solid bits of food do not, so they collect in the bottom of the basket where you can see them and remove them.
The number and size of those holes is the balance point of the whole design. Too few holes, or holes too small, and the sink drains like a leaky bucket. You end up standing there waiting for the water to clear. Too many holes, or holes too wide, and the small debris you were trying to stop sails straight through.
Twenty openings across an 8 cm basket sits in sensible territory. Water moves at a normal rate while rice grains, pasta scraps, peelings, crumbs and most coffee grounds stay put. Very fine particles will always pass through any open strainer, which is worth knowing. If you brew a lot of coffee, scrape the grounds into the compost rather than rinsing the filter straight into the sink. The strainer catches what gets past you, not what you deliberately pour down.
The depth matters too. At 1.8 cm high, this basket sits low in the opening rather than standing proud in the bowl. You can stack a pot over it without it getting in the way, and it does not catch on sponges or cloths while you are washing up.
Getting the size right
This is where most people go wrong, and it is easily avoided. A strainer that does not match your drain opening is useless. Either it will not drop in at all, or it rattles around loosely and lifts up every time you run the faucet hard.
The figure that matters here is 8 cm, which is 3.15 inches. That is the diameter of the strainer and the size of the drain opening it is built to suit. The maker also lists the compatible groove diameter as 8 cm, which refers to the ledge inside the drain opening that the basket rests on.
Checking yours takes thirty seconds. Lift out whatever is currently in your drain, lay a tape measure or ruler across the opening at its widest point, and read the number. If it comes out at or very near 8 cm, you are in the right place. If it reads noticeably more or less, this size will not seat properly and you want a different one.
Shape matters alongside size. This is a round strainer for a round opening. Square and rectangular drain openings exist, mainly in some modern sinks, and a round basket will not cover them.
Stainless steel versus everything else
You can buy sink strainers in plastic, silicone and steel. Each has a case, but steel wins on the things that matter day to day.
Plastic baskets are cheap and light, and they stain. Tomato sauce, turmeric and coffee all leave their mark, and after a few months the thing looks grubby no matter how hard you scrub. Plastic also holds odour, because the surface is slightly porous and food residue works its way in.
Silicone is flexible, which sounds useful until you realise a flexible strainer can deform under a heavy pot and let debris past. It also grabs grease and holds onto it.
Stainless steel with a polished finish, which is what this one has, rinses clean because there is nowhere for residue to hide. It does not stain from food colour, it does not pick up smells, and it does not go brittle. It can also go through a dishwasher cycle without warping. Give it a wipe and it looks the same as the day it arrived.
The one thing to watch is scouring. Steel wool and gritty cleaning powders will leave fine scratches in a polished surface over time. Dish soap and a soft brush do the job without any of that.
Who this suits
If you cook from scratch, you need something like this. Chopping vegetables, draining pasta, rinsing a rice pot: all of these send solids towards the drain whether you mean them to or not. A basket catches them before they get anywhere.
Renters get a lot of value from it too, because nothing is permanent. It drops in and lifts out, so there is no drilling, no adhesive, and nothing to put back when you move. The strainers come with you.
Households with older plumbing are another good fit. Old pipes have rougher inner surfaces and narrower effective bores, so they catch debris more readily than new ones. Keeping solids out of them in the first place is the sensible move.
Two in a pack covers the common situations. A double bowl sink gets one in each side. A single bowl kitchen gets one in use and one in the drawer, so there is always a clean replacement while the first is in the dishwasher.
Living with it
The habit is simple. When you finish washing up, lift the basket out by hand, tip the contents into the compost caddy or the garbage, and rinse it under the faucet. If anything greasy has built up, a squirt of dish soap and a soft brush sorts it. Set it back in the opening and you are done.
Do that daily and it never becomes a chore. Leave it a week and you will find a damp layer of food at the bottom that smells and slows the water right down. The basket is doing its job either way, but emptying it is the part that makes the system work.
Every so often, send it through the dishwasher with your regular load. Secure it so it does not flip over mid cycle. That deals with anything a rinse has missed.
A few things worth avoiding. Do not pour fat or oil down a drain even with a strainer fitted, because liquid fat passes straight through the holes and solidifies in the pipe. Do not use a basket strainer as a substitute for a proper sealed stopper if you want to fill the sink, because open drainage holes will not hold water. And if your drain is already running slow, fitting a strainer stops things getting worse but does not clear what is already down there.
The short version
This is a two pack of polished stainless steel sink strainer stoppers, each one 8 cm (3.15 in) across and 1.8 cm high, with twenty drainage holes. They suit standard round drain openings of a matching size. They drop in by hand, lift out by hand, rinse clean under the faucet and can go in the dishwasher. Each weighs 60 g.
Measure your drain opening before you order. If it reads around 8 cm and the opening is round, these will seat properly and start earning their keep from the first wash up. If it reads something else, look for a strainer that matches your measurement instead. The right size is the whole thing.