Bathroom Sink Parts Explorer
Faucet on top, drain and trap underneath. Tap a part to see what it does, the signs it is going bad, and the replacement we stock.
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All 11 parts
Shop all faucet & sink parts (1607)Tools for the job
Not sure which one you need?
Bring the old part into our Cape Coral or Fort Myers store — we’ll match it on the spot. Most repair parts are in stock, or order online for free in-store pickup.
Bathroom Sink parts guide
Faucet Body & Spout
The faucet itself. Single-handle and 4" centerset are the most common bathroom styles.
Signs it’s failing: Leaks from the base; Corroded or dated finish; Cracked body.
Cartridge / Stem
The valve inside the faucet that mixes hot and cold and shuts the water off.
Signs it’s failing: Drips from the spout; Hard to turn; Hot and cold mixed up or only one works.
Handle
Turns the cartridge. Usually held on by a set screw under a decorative cap.
Signs it’s failing: Handle spins without doing anything (stripped); Cracked or missing cap.
Aerator
The screen at the tip of the spout that shapes the stream and limits flow.
Signs it’s failing: Low pressure at just this faucet; Spray goes sideways or sputters.
Sink Basin
Drop-in, undermount, vessel or pedestal.
Signs it’s failing: Cracks or chips; Failed caulk line.
Pop-Up Stopper & Rod
The stopper and the linkage behind the faucet that raises and lowers it.
Signs it’s failing: Stopper won’t close or won’t stay up; Hair clog around the stopper; Leak at the pivot nut.
Drain Body & Flange
The drain assembly through the sink hole, sealed with putty or a gasket on top and a nut underneath.
Signs it’s failing: Leak right under the basin; Corroded flange.
Tailpiece
The straight pipe from the drain body down to the trap.
Signs it’s failing: Drip at the slip nut; Rusted-through metal tailpiece.
P-Trap
The U-bend that holds water to block sewer gas, and catches rings and clogs.
Signs it’s failing: Leak at either slip nut; Sewer smell (dry or cracked trap); Slow drain.
Faucet Supply Lines
The two flexible hoses from the shutoffs to the faucet.
Signs it’s failing: Drip at a nut; Kinked or bulging line.
Shutoff Valves
The hot and cold valves under the sink.
Signs it’s failing: Won’t shut off fully; Stem drips.