People use a few names, depending on the sink and parts you mean:

• Drain assembly: The full set of parts that connects the sink to the plumbing below.
• Basket strainer: Common in kitchen sinks; it catches food and can double as a stopper.
• Pop-up drain (lavatory drain): Common in bathroom sinks; it uses a stopper you lift or push to seal.
• Flange: The visible ring at the drain opening.
• Strainer/drain protector: A removable screen that sits on top to catch debris.

Kitchen drains are typically 3-1/2 inches; bathroom drains are smaller. Checking size and type on the product page can help you get a proper fit.

That lever on a bathroom sink is typically called the lift rod. It connects to a few simple parts that move the stopper:

• Lift rod: The vertical rod you pull up/down behind the faucet.
• Clevis strap: The flat, slotted connector linking the lift rod to the pivot.
• Pivot rod (ball rod): The horizontal rod that enters the drain body and moves the stopper up/down.

Some modern drains use a push pop-up or click-clack stopper, so there’s no lever at all—you just press the stopper to open or close. Reviewing the drain style before buying can help you match your setup.

Many DIYers handle this, especially with drop-in strainers or pop-up kits. A general approach is:

1. Confirm size/type: Kitchen usually uses a basket strainer; bathroom uses a pop-up (with or without overflow).
2. Gather basics: Pliers/wrench, bucket, plumber’s putty or the included gasket, and plumber’s tape if threads are specified.
3. Remove the old drain: Loosen the P-trap, catch water in a bucket, then unthread the locknut and lift out the old assembly.
4. Clean and install: Clean the opening. Set the new flange with putty or gasket per instructions, tighten evenly, reconnect the trap, and test for leaks.

If fittings are corroded, space is tight, or you’re unsure, a licensed pro can help. You can choose pickup or delivery at checkout for convenience.

It varies by sink type. Here’s a quick breakdown:

• Kitchen (basket strainer style): Flange (top ring), strainer basket, stopper/seal, rubber washer, friction ring, locknut, and a tailpiece that connects to the P-trap.
• Bathroom (pop-up style): Flange (top ring), drain body, stopper, lift rod, clevis strap, pivot (ball) rod with clip, gaskets/washers, locknut, and tailpiece.

Some accessories sit above the opening, like mesh strainers or universal drain protectors that catch debris. Names and exact parts can vary by manufacturer, so checking the product’s parts diagram can help with compatibility and installation.

Start by measuring your drain opening and choosing the style that fits your sink:

• Kitchen sinks: The opening is typically 3-1/2 inches. Over-the-drain strainers often have a wider rim (around 4.5 inches) to rest on the sink deck.
• Bathroom sinks: Smaller diameters are common; look for conical or small cup strainers sized around 1.1–1.6 inches.
• Style and material: Mesh or micro-perforated designs catch finer debris; stainless steel or silicone are popular for durability and easy cleaning.
• Compatibility: Check depth, whether you have an attached stopper, and disposal compatibility if applicable.

Using size filters on the product page can make matching faster.