Sink Repair Service
Call Now (855) 557-9600
Sink repair stops supply line drips that rot cabinet floors, seals failed basket strainer joints that feed mold growth, and replaces cracked drain tailpieces before water damage spreads to the subfloor. Bonded Plumbworks’ licensed plumbers trace every leak to its exact source — P-trap joint, faucet supply hose, basket strainer seal, or shutoff valve — then replace the defective component with code-approved materials.
What Is Sink Repair
Sink repair addresses leaks and malfunctions at the sink basin, drain assembly, basket strainer, supply connections, and P-trap. Unlike faucet repair, which focuses on the water supply fixture, sink repair deals with the basin itself and the drain-side plumbing.
Common sink repair issues include a leaking basket strainer (the drain fitting in the bottom of the basin), loose or corroded P-trap connections, cracked drain tailpieces, failed silicone sealant at the countertop-to-sink joint, and supply line drips at the shut-off valve connections. In undermount sinks, adhesive failure can cause the basin to separate from the countertop — a structural repair that requires re-bonding.
When to Schedule Sink Repair
Water under the sink cabinet is the most obvious sign. Check during and after sink use to identify the source: water during use suggests a drain-side leak, while standing water that appears when the sink is not running points to a supply connection failure. A slow drain that persists after cleaning the P-trap may indicate a cracked tailpiece or misaligned drain connection. Visible corrosion on the basket strainer, green oxidation on copper supply connections, or a musty smell inside the cabinet all warrant professional inspection.
An undermount sink that shifts or moves when pressed upward has lost adhesive bond and needs immediate re-bonding before it detaches completely.
How It Works
Diagnosis
We identify the leak source by running water through the sink while inspecting the basket strainer, tailpiece, P-trap, supply connections, and mounting sealant. We use a flashlight and mirror to check connections that are not easily visible.
Repair
Basket strainer leaks are resolved by removing the strainer, cleaning the sink surface, and reinstalling with fresh plumber’s putty and a new rubber gasket. A bucket placed beneath the P-trap catches residual water when the trap is disconnected, preventing cabinet floor damage during sink repair disassembly. Corroded P-traps are replaced with new PVC or chrome assemblies. Channel-lock pliers grip the large-diameter slip-joint nuts on P-trap connections that an adjustable wrench cannot reach, making them essential for sink repair on older chrome drain assemblies. Dripping supply connections are tightened or replaced with new braided stainless steel lines. Failed sealant around drop-in or undermount sinks is removed and replaced with new silicone.
For undermount sink re-bonding, we support the basin with a temporary brace, clean the bonding surfaces, apply two-part epoxy, and reinstall the mounting clips. The adhesive requires 24 hours to fully cure.
Testing
After repair, we fill the basin to the overflow, release the drain, and inspect every connection under full flow and pressure. All repaired areas are rechecked after 10 minutes of standing water to confirm zero leaks.
An adjustable wrench handles the slip-joint nuts on P-trap connections during sink repair, while an aerator key removes recessed faucet aerators that have seized from mineral buildup and restrict flow. The angle stop shutoff valve beneath the sink must close completely before any sink repair work begins — if the valve leaks or fails to shut off, it is replaced during the same visit. A basin wrench reaches the faucet mounting nuts in the tight space behind the sink basin, which is the only tool that provides the leverage needed for sink repair involving faucet-to-basin connections. A digital leak detector identifies moisture behind walls and under cabinets that visual inspection during sink repair cannot reveal, confirming whether water damage has spread beyond the visible leak area.
Benefits vs Alternatives
Repairing sink leaks early prevents the cascade of secondary damage — warped cabinets, mold, subfloor deterioration — that makes a minor plumbing issue into a major renovation. A basket strainer replacement costs a fraction of replacing a mold-damaged cabinet floor.
The alternative — full sink replacement — is warranted only when the basin itself is cracked, chipped, or stained beyond practical repair. For most leak issues, targeted repair resolves the problem completely.
Pricing
Sink repair typically costs $125 to $350 depending on the failure type and complexity. Basket strainer and P-trap replacements are at the lower end. Undermount sink re-bonding and multi-point leak repair are at the higher end. Bonded Plumbworks diagnoses the problem and provides an estimate before starting repair.
Qualifications
Bonded Plumbworks plumbers hold active state plumbing licenses and have been repairing residential sinks since 2006. We maintain an A+ rating with the Better Business Bureau (BBB) and are members of the Plumbing-Heating-Cooling Contractors Association (PHCC).
Frequently Asked Questions
Why is my sink leaking from the bottom?
A leak from the bottom of the sink basin almost always indicates a failed basket strainer seal. The plumber’s putty or rubber gasket between the strainer and the sink surface has dried, cracked, or loosened, allowing water to seep through. Removing and reinstalling the strainer with fresh putty and a new gasket resolves the issue.
Can you fix a cracked porcelain sink?
Minor surface cracks and chips in porcelain sinks can be repaired with epoxy-based porcelain repair compounds. However, structural cracks that allow water to pass through the basin material require sink replacement. We assess the crack type and recommend the appropriate solution.
How do I know if my P-trap is leaking?
Place dry paper towels under the P-trap connections, run the sink for 30 seconds, and check the towels. A wet towel pinpoints the leak location. Common causes are loose slip-joint nuts, cracked P-trap bends, and corroded chrome traps.
Is water under my sink an emergency?
Any active leak under a sink should be addressed promptly. Turn off the shut-off valves beneath the sink to stop the water supply, and place a container under the leak to catch drips. Contact us for same-day service to prevent cabinet and floor damage.
Back to Faucet Fixture Services
Schedule Today
Call Bonded Plumbworks at (855) 557-9600 to schedule sink repair. Bonded Plumbworks’ licensed plumbers diagnose and fix sink leaks before water damage spreads. Every sink repair service includes a 90-day guarantee on sink repair work, covering parts and labor.