Sink Leak Detection and Repair in Round Rock, TX
Most sink leaks announce themselves in the cabinet below. By the time you reach past the cleaning supplies and feel a damp floor, the water has often been working on the particleboard for a while.
The cabinet tells the story
A sink brings several connections together in a small space, and any of them can weep. The supply lines and shutoff valves feed it, the faucet shanks pass through the deck, the basket strainer seals the drain, and the P-trap carries the waste. Water from a high connection runs down and pools at the cabinet floor, so where it lands rarely matches where it started.
In Greenslopes kitchens, the strainer and the trap are the usual culprits, while the supply stops are the ones that let go without warning. Either way, the cabinet floor is where the water collects.
Tracing which connection failed
We dry the cabinet and work top down. Running the faucet shows a supply or shank leak under pressure, while filling and then draining the basin reveals a strainer or trap leak that only appears with standing water. A tissue laid along each joint catches the first bead so we can name the exact fitting. That tells us what to repair and rules out the parts that are fine.
If the floor of your sink cabinet is dark or swollen, call (512) 737-6168 and we can find the source before it spreads.
Supply, trap, or strainer repair
A weeping supply line or shutoff valve is replaced and seated correctly. A leaking basket strainer is pulled and reseated with fresh sealant so the drain stops seeping into the cabinet. A dripping P-trap gets new washers or a new trap where the old one is corroded. We tighten to spec rather than overtorque, since a stripped nut is how a small leak becomes a steady one.
Where the cabinet base has already swelled, we point out the damage so you can decide on restoring it.
Why sink leaks rot a cabinet fast
The cabinet floor under most sinks is particleboard with a thin laminate, and it drinks water. A slow weep that would barely mark a tile floor will swell and crumble that base in weeks, then feed mold in the dark, closed space. The hard water here leaves white crust at a failing joint, which is often the first visible sign before the wood goes soft.
Catching it early keeps the repair at the plumbing, not the cabinetry.
A garbage disposal adds its own leak points to a kitchen sink, and they are easy to miss. The unit can weep at the sink flange on top, at the dishwasher inlet on the side, or at the discharge tube into the trap. A cracked disposal body leaks from the bottom seam entirely. Each drips to the same cabinet floor, so we check the disposal along with the trap and strainer rather than stopping at the first wet fitting. Where the body itself has cracked, no reseal will hold and it needs replacing, and we tell you that before you buy a part you do not need.
What to expect when we arrive
We clear the cabinet, dry it, and find which connection is leaking before we start, so the repair targets the real fitting. You hear the cause and the cost first. With your go-ahead we make the fix and run the sink through fill, drain, and pressure to confirm every joint holds.
We leave the cabinet dry and the area clean. For a sink actively leaking into the cabinet, call (512) 737-6168 and we can take care of it.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
Where do most sink leaks come from?
The supply stops, the faucet shanks, the basket strainer, or the P-trap. Water from any high connection pools at the cabinet floor, so we trace it to the exact fitting.
Why is my cabinet floor swollen but I never saw a leak?
A slow weep runs down and soaks the particleboard base quietly. The hard-water crust at a joint is often the only early sign before the wood softens.
Can you fix it without replacing the cabinet?
The plumbing repair is separate from the cabinet. We stop the leak first. If the base has already swelled, we point it out so you can decide on restoring it.
Related leak services
The drip you see and the under-sink weep you do not.
View → DrainWaste-line leaks that only show when water actually runs.
View → ToiletWater at the base, a failing flange, or a leaking supply line.
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