Sink Installation & Repair Parts

Sink installation parts and repair parts cover the entire job under a sink. The range runs from a Richelieu undermount support system that lets one person set a heavy bowl down to a 50-pack of 1-1/2" slip-joint washers. Installing a new sink, fixing a drip at the strainer, or getting a bathroom stopper to seal again? Three things decide the part: the drain opening size, the faucet brand, and how the bowl mounts to the counter. Figure out the job, then match the part to the sink you have. The mounting hardware, the drain kits, and the small parts that keep an old sink working all live here.

Sink Installation Parts for Every Installation

Five groups cover the whole job. Find yours in the left column and go straight to the category.

Part group	What it handles	Example in stock	Browse
Kitchen drain	Basket strainers, baskets and commercial strainer plates for 3-1/2" and smaller openings	Danco 81091 3-1/2" stainless basket strainer with lock-in post	Sink strainers
Bathroom drain	Pop-up assemblies, stoppers, pivot rods and lift rods	Pfister 972-097 1.25" push-and-seal drain	Pop-up drains and parts
Mounting	Rim clips, undermount supports, sink setters and hole covers	Richelieu 919125 sink installation and support system	Sink hangers, supports and clips
Full hookup	Drain and trap for a new sink in one box	Double-bowl kitchen sink drain kit	Sink installation kits
Wear parts	Slip-joint washers, gaskets and nuts for tubular drains	1-1/2" rubber slip-joint washers, pack of 50	Slip-joint nuts and washers

These are the sink drain parts and mounting parts a plumber carries on the truck, not the general plumbing aisle.

Which Kitchen Sink Drain Parts Fit Your Sink Opening?

Kitchen work is where the strainer lives. Most kitchen sinks generally have a 3-1/2" basket strainer, and the kitchen sink drain parts here cover that size plus every smaller opening.

3-1/2" basket strainers: stainless steel, chrome, and brushed nickel bodies from Danco, Proplus, Keeney and Premier. Pick a lock-in post or a peg post, and a long-shank body if the bowl is thick or the tailpiece sits low.
Commercial strainers: 3-1/2" flat waste strainer plates and strainer repair kits for restaurant and school sinks.
Bar, laundry and utility strainers: 2" to 2-1/2" bar and laundry tub strainers, and 1-1/2" brass strainers for utility tubs.
Bathroom strainers: 1" and 1-1/4" drain strainers and hair-catcher replacement baskets.
Tubular drains: flexible tailpieces, brass tubular parts in 20- and 22-gauge, J-bends and P-traps with cleanouts. Dishwasher branch tailpieces with a 3/4" inlet are under tubular drains.

Which Sink Stopper Parts Do You Need for a Bathroom Pop-Up?

Pop-up drains are primarily used in bathroom sinks. Four sink stopper parts wear out or get damaged: the stopper, the pivot (ball) rod, the lift rod, and the clip that joins them. Two things pick the part: stopper size and faucet brand.

Part	Measure	Size	Fits	Best for
Pop-up stopper	Head diameter	1" and 1.4"	Universal	Any standard bathroom pop-up
Pop-up stopper	Head diameter	1.3"	Moen	Moen faucets and drains
Pop-up stopper	Head diameter	1.55"	Kohler	Kohler drains
Pop-up stopper	Overall length	4-1/8"	Gerber and Sayco	Older brand-specific drains
Pop-up stopper	Overall length	4-1/2"	Pfister	Older Pfister lavatory drains
Ball rod and pivot rod	Rod style	Universal, plus Gerber, Pfister and Sayco styles	Most lavatory drains	Stopper that will not move
Complete pop-up assembly	Drain size	1-1/4" brass or plastic	Standard or vessel sink	Rusted or leaking drain body
Push-and-seal drain	Drain size	1.25" plastic	Pfister	No rod under the sink

Buy by the bowl, not the sink style. No overflow hole means a no-overflow pop-up; an overflow hole means a standard one, and some vessel bowls do have one. Before you order, measure the old stopper and check the faucet brand if the rod is the part causing the problem.

What Wears Out First: Washers, Baskets or Stoppers?

The strainer body and the drain body last for years. The washers, baskets and stoppers don't. Keep them on the truck, so a drip becomes a ten-minute fix instead of a second visit.

Slip-joint washers: Available in rubber, poly, and beveled styles in 1-1/4", 1-1/2", and 1-1/2" x 1-1/4" reducer sizes (sold individually or in 50, 100, and 200 bulk packs). Use 1-1/4" for bathroom drains and 1-1/2" for kitchen drains.
Slip-joint nuts: Die-cast, chrome, and plastic options in standard 1-1/4" and 1-1/2" sizes, available individually or in 10-packs.
Strainer baskets: Swap out a worn cup while keeping the original strainer body intact.
Stoppers: Among the highest-turnover sink stopper parts; stock up on 1" universal pop-up stoppers in 10-packs for quick service jobs.

Reorder washers and nuts according to the drain line tube size, and match stoppers to the faucet brands and sizes in the table above.

What Sink Installation Parts Hold a Drop-In, Undermount or Vessel Sink?

Sink installation parts are what hold the bowl to the counter and hook it up the first time. Order them by how the sink mounts.

Drop-in sinks: Rim clips available in packs of 8, 10, and 14 from Premier, Elkay, and Larsen, featuring standard clips for stainless steel bowls and adjustable clips for thick tile or stone tops.
Undermount sinks: Secure heavy bowls with the Richelieu PW99 26" sink setter or the Richelieu 919125 support system. The 919125 uses two ratchets and a movable sling on the cabinet side walls so one person can hold the bowl while the adhesive sets. The sling spans openings up to 36" wide, and it holds more when it's fixed into solid wood.
Vessel sinks: Specialized installations need a polished chrome mounting ring paired with a vessel-sink pop-up.
Extra faucet holes: Snap-in and threaded sink hole covers in 1-1/4" to 2", in finishes like chrome, nickel, brushed nickel, oil-rubbed bronze, matte black, and white.
Full hookup: Double-bowl and single-bowl kitchen sink drain kits put the drain and trap in one box, and a single-bowl tubular-only kit covers the trap assembly alone when the strainer is staying. Check the listing for exactly what's included before ordering.

The same job usually touches the faucet. Cartridges, stems and seats are in faucet valve parts, and brand repair kits are in installation and rebuild kits. Order by size and brand, not by part name, so you get the exact fit the first time.

Why Buy Your Sink Installation Parts from DK Hardware?

DK Hardware has the sink installation parts and repair parts in stock that a service plumber or maintenance shop runs on, and the terms are built for buying by the pack.

Net 30 terms and tax-exempt accounts through DK Net Terms for eligible businesses.
Volume pricing on strainers, stoppers, washers, and kits ordered by the case, through DK Hardware volume discounts.
Bring us a lower verified price on the same part, and we will match it.
24/7 help at 877-509-8040 and live chat when you need the right size fast.

Frequently Asked Questions - Sink Installation Parts

What are the sink parts called?

The strainer or pop-up drain sits inside the bowl and connects directly to the tailpiece. Slip-joint nuts and washers join the tailpiece to the P-trap and wall tube. The faucet and supply lines carry the water, while rim clips or undermount supports hold the bowl to the counter.

What supplies are needed to install a sink?

A basket strainer or pop-up drain, a tailpiece, a P-trap, slip-joint nuts and washers, two faucet supply lines, and rim clips or undermount supports. A sink installation kit packs the drain and trap into one box for a single or double bowl.

What are the replacement parts for a kitchen sink?

Basket strainer, the strainer basket alone, slip-joint washers and nuts, the tailpiece, and the P-trap are the most common kitchen sink drain parts that get replaced. Up top, the most swapped sink faucet parts are cartridges, sprayers, aerators, and supply lines.

What are the sink drain parts called?

A kitchen drain has a strainer body, a basket, a locknut, a gasket, and a tailpiece. A bathroom drain has a pop-up body, a stopper, a pivot rod, and a lift rod. Both connect below to slip-joint nuts, a J-bend, and a trap arm.

How do I replace the sink stopper with a pop-up assembly?

Look inside the bowl for an overflow hole first. If there is one, buy a standard pop-up with an overflow slot in the body; if there isn't, buy a no-overflow pop-up, sold as a vessel pop-up. Most bathroom drains are 1-1/4". Fit the new body, run the pivot rod through the drain, and clip it to the lift rod. Push-and-seal drains skip the rod.

Get Your Sink Set and Draining

A new sink going in, or one more year out of an old drain? The mounting hardware and the sink drain parts to keep it running are both here. Pin down the opening size, the faucet brand, and the mount, then lean on DK Hardware for terms and sizes. The part you need isn't listed? Request a quote with the part number and size, or call 877-509-8040 any hour.

Explore kitchen cabinet handles