We start every kitchen sink replacement by shutting off the water supply and disconnecting the drain lines with channel locks and adjustable wrenches. Next we check the countertop cutout against Montgomery County sink depth rules and inspect the P-trap and supply stops for corrosion caused by four distinct seasons. In homes in Downtown Gaithersburg or Kentlands we often find older cast-iron drains that require full replacement to prevent future leaks under humidity swings.
We remove the old sink and clean the rim area before setting the new unit on a bead of plumber's putty or silicone rated for food contact. We secure the clips from below and reconnect with new braided stainless supply lines and a compression-fit drain assembly. After turning the water back on we run both hot and cold for five minutes while checking every joint for drips and confirming the disposal wiring meets local electrical tie-in standards.
Final verification includes a water test at full pressure and a visual check of the shutoff valves under the sink. We leave the area clean and note any cabinet modifications needed for deeper bowls common in Lakelands or Quince Orchard homes. All work follows current Montgomery County plumbing code updates for backflow prevention.
Kitchen Sink Replacement Service Services We Offer
✓Stainless Steel Sink Replacement
Swaps corroded sinks for 16-gauge stainless models that handle temperature swings without pitting in Gaithersburg homes.
✓Granite Composite Sink Installation
Installs heat-resistant composite sinks that resist staining from hard water common in Montgomery County.
✓Undermount Sink Conversion
Removes top-mount sinks and converts to undermount style with new countertop support brackets for cleaner edges.
✓Farmhouse Sink Replacement
Replaces standard sinks with apron-front models while reinforcing cabinet fronts to carry the added weight.
✓Disposal-Integrated Sink Swap
Replaces sinks and updates disposal mounting hardware plus electrical connections to current code.
Kitchen Sink Replacement Service Cost in Gaithersburg, MD
| Service | Typical Range | What Affects It |
|---|---|---|
| Standard Sink Replacement | $300–$550 | Sink material weight and existing pipe condition change labor time. |
| Drain Line Upgrade | $150–$300 | Corroded cast iron or undersized lines require additional fittings and time. |
| Disposal Reinstall | $80–$175 | Electrical tie-in and new mounting flange add steps when the unit stays. |
| Countertop Rim Repair | $120–$250 | Damaged particle board edges need patching before the new sink seats. |
Ranges are typical for Gaithersburg, MD and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Assessment
We inspect the existing sink, drain lines, shutoff valves and countertop condition.
- 2
Water Shutoff And Removal
We isolate the water supply then detach the old sink and clear debris from the rim.
- 3
New Unit Placement
We set the replacement sink, secure mounting hardware and connect new supply and drain lines.
- 4
Pressure Test And Cleanup
We restore water flow, check all joints for leaks and remove all debris from the workspace.
Pricing
We give an upfront itemized quote after the initial inspection before any work begins.