Sink Installation Service
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Sink installation seats a new basin, routes supply lines to hot and cold shut-offs, and assembles the drain and trap so water flows cleanly without pooling beneath the cabinet or violating the International Plumbing Code. Bonded Plumbworks’ licensed plumbers fit drop-in, undermount, farmhouse, vessel, and wall-mount sinks using proper drainage slope, sealed deck penetrations, and code-compliant P-trap geometry. Every installation is pressure-tested at the supply connections and drain joints before the job is closed out.
What Is Sink Installation
Sink installation is the process of mounting a sink basin to a countertop, vanity, or wall and connecting it to the hot and cold water supply lines and the drain-waste-vent (DWV) system. The work involves positioning the sink, securing it with clips or adhesive (for undermount), connecting the faucet supply lines, installing the basket strainer or drain assembly, connecting the P-trap to the wall drain, and verifying that the drain has proper slope and venting to prevent siphoning and sewer gas entry.
Each sink type has a distinct mounting method. Drop-in sinks rest on the countertop rim. Undermount sinks are bonded beneath the counter with adhesive and clips. Farmhouse (apron-front) sinks require a custom cabinet opening. Vessel sinks sit on top of the counter and use a vessel-specific drain. Wall-mount sinks attach directly to framing-backed wall blocking.
When to Schedule Sink Installation
You need sink installation when building or remodeling a kitchen or bathroom, replacing a damaged or stained sink basin, upgrading from a single-bowl to a double-bowl configuration, converting from a drop-in to an undermount style, or adding a new sink to a laundry room, wet bar, or workshop.
Sink installation is also necessary when changing countertop material — a granite or quartz countertop upgrade typically involves undermount sink installation that differs from the original drop-in configuration.
How It Works
Pre-Installation Assessment
We measure the cabinet opening, verify countertop cutout dimensions, and confirm compatibility with the selected sink. For undermount installations, we verify the countertop material can support the sink weight when filled with water. We inspect the existing drain and supply connections for compatibility. Sink installation inspection gives you a live view of the cabinet, plumbing connections, and countertop condition before any work starts. You approve the quote before any installation begins.
Mounting
Drop-in sinks are set into the countertop cutout on a bed of silicone sealant and secured with clips from below. Undermount sinks are bonded to the countertop underside with two-part epoxy and supported by clips or brackets. Farmhouse sinks are set into a custom cabinet opening and supported on the cabinet base. We ensure level positioning and a complete sealant bead to prevent water intrusion.
Plumbing Connections
Faucet supply lines are connected to the angle stop valves, which provide individual hot and cold shut-off control directly at the sink installation location. The basket strainer or drain assembly is installed with plumber’s putty and tightened to the manufacturer’s torque specification. The P-trap is connected to the drain tailpiece and the wall drain stub-out. For double-bowl sinks, we install a continuous waste assembly or separate P-traps per code. An air admittance valve provides venting where extending a traditional vent stack is impractical, preventing the trap siphon and sewer gas entry that occur in unvented sink installations.
Testing
We run water through both hot and cold supply lines, fill the basin, and test drainage. All connection points are inspected for leaks under pressure. We verify proper drainage slope and check for gurgling or slow drainage that would indicate a venting issue. When a dishwasher connects to the sink drain, an air gap fitting prevents contaminated water from siphoning back into the dishwasher — a code requirement in several states that applies to every kitchen sink installation with a dishwasher connection. The air gap (dishwasher) mounts through a countertop hole and provides a physical break in the drain line between the dishwasher and the disposal or drain tailpiece.
Benefits vs Alternatives
Professional sink installation avoids the common pitfalls of DIY work: improper undermount bonding that leads to sink detachment, cross-threaded drain connections that leak, and missing or improper P-trap installation that allows sewer gas into the home. A professional also identifies and addresses issues with the existing plumbing — corroded drain pipes, non-functional shut-off valves, or inadequate venting — that a homeowner might overlook.
The alternative — homeowner installation — is feasible for drop-in sinks with existing plumbing in place but carries higher risk for undermount, farmhouse, and wall-mount installations where mounting precision and structural support are critical.
Pricing
Sink installation labor ranges from $200 to $600 depending on the sink type and complexity. Drop-in sink installations with existing plumbing are at the lower end. Undermount and farmhouse installations requiring adhesive bonding, custom fitting, or drain reconfiguration are at the higher end. The sink basin cost is separate and ranges widely — $100 to $400 for stainless steel, $200 to $800 for composite, and $400 to $1,500 or more for fireclay farmhouse models. Bonded Plumbworks provides a complete estimate covering labor, connections, and any needed modifications.
Qualifications
Bonded Plumbworks plumbers hold active state plumbing licenses and have been installing sinks since 2006. We install models from Kohler, Blanco, Kraus, Elkay, Rohl, and American Standard. Freestanding utility sink installations receive a dedicated anchor kit to secure the legs to the floor, preventing movement that stresses supply and drain connections under heavy water loads. 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
Can I change from a drop-in to an undermount sink?
Yes, if your countertop material supports undermount installation. Granite, quartz, and solid surface countertops work well with undermount sinks. Laminate countertops generally cannot support undermount installations because the exposed particleboard edge absorbs water. A countertop modification may be needed to adjust the cutout size.
How long does sink installation take?
A straightforward drop-in sink installation takes one to two hours. Undermount and farmhouse installations may take two to four hours depending on mounting requirements, adhesive cure time, and any needed drain modifications.
How much does sink installation cost?
Sink installation labor ranges from $200 to $600 depending on the sink type and complexity. Drop-in sink installation with existing plumbing runs $200 to $350. Undermount and farmhouse sink installation requiring adhesive bonding, custom fitting, or drain reconfiguration costs $400 to $600. Bonded Plumbworks provides a complete sink installation estimate covering labor, connections, and any needed modifications.
Can you add a sink where there is no existing plumbing?
Yes. We can run new supply lines and drain connections to locations that do not currently have plumbing. A basement sink installation requires an ejector pump or upflush system when the drain outlet sits below the main sewer line. This requires wall and floor access for pipe routing and may require a permit. New drain connections must tie into the existing DWV system with proper venting.
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Schedule Today
Call Bonded Plumbworks at (855) 557-9600 to schedule sink installation. Bonded Plumbworks’ licensed plumbers install drop-in, undermount, farmhouse, and vessel sinks with precise mounting and leak-free connections. Every sink installation service includes a 90-day guarantee on sink installation work, covering parts and labor.