Installing a double Drainboard Sink adds both practicality and sophistication to a modern kitchen or commercial workspace. With two large draining surfaces on either side of the basin, it offers a dedicated area for washing, drying, and food preparation. Proper installation ensures long-term performance and water-tight stability. The following guide explains every step from preparation to finishing touches.

Understanding the Structure

A double drainboard sink consists of a central basin, two extended draining panels, and an integrated rim that rests securely on the countertop. Most models are made of SUS304 stainless steel, which provides corrosion resistance and easy maintenance. The drainboards usually slope at a 3–5° angle, guiding excess water efficiently back into the bowl. These sinks can be top-mount or under-mount depending on your counter design, and installation steps differ slightly for each.

Step 1: Preparation and Measurement

Before cutting or mounting, ensure that the countertop can support the total width and weight of the sink. Use a tape measure to confirm the size:

Use a cardboard template (often provided by the manufacturer) to mark the cutting outline. Always double-check the placement relative to the plumbing and cabinet supports beneath.

Step 2: Cutting the Countertop

For stone or composite tops, use a diamond-edge jigsaw blade or have a professional fabricator perform the cut. For wooden or laminate tops, a fine-tooth circular saw will suffice. Cut slowly to avoid chipping, then sand the inner edges smooth. Apply waterproof silicone sealant along the inner perimeter to protect the material from moisture infiltration.

Step 3: Fitting the Sink and Sealant Application

Lower the sink carefully into the opening. The drainboards should rest evenly on both sides without warping. If you are installing a top-mount version, ensure that the rim overlaps the countertop uniformly. For under-mount sinks, use stainless steel clips beneath the counter to secure the bowl.

Run a continuous bead of neutral-cure silicone between the rim and countertop to prevent leaks. Press down firmly and wipe away excess sealant. Let it cure for at least 12 hours before connecting the plumbing.

Step 4: Plumbing Connections

Attach the strainer basket assembly into the sink’s drain hole using a rubber gasket and plumber’s putty to form a watertight seal. Connect the P-trap, tailpiece, and waste pipe according to local plumbing codes. If the sink includes dual drains, use a Y-connector to merge them into a single outlet.

Tighten all nuts by hand first, then secure with a wrench by turning an additional quarter rotation. Over-tightening may damage the fittings. Run water to check for leaks, and re-seal any weak points with extra plumber’s tape or silicone.

Step 5: Attaching Faucets and Accessories

Mount the faucet through the pre-drilled hole on the rear deck or countertop. Align it properly before tightening the retaining nuts from below. Use stainless braided hoses to connect hot and cold lines. If your sink includes an overflow outlet or Soap Dispenser, follow the same method, ensuring each gasket sits flush with the surface.

Install optional accessories such as sink grids, colanders, or cutting boards to enhance usability. These additions transform the drainboards into multi-functional work zones for dish drying and meal prep.

Step 6: Testing and Finishing Touches

Turn on the water supply and check every connection. Fill the basin and drain it completely to confirm that water flows freely toward the outlet and the drainboards slope correctly. Wipe the entire surface with a soft cloth and non-abrasive detergent. Avoid using steel wool that could scratch the stainless steel finish.

For a professional appearance, polish the rim and boards using microfiber pads and food-grade stainless steel cleaner. Once the silicone fully cures, your double drainboard sink will be ready for everyday use.

Maintenance Tips for Longevity

• Clean after each use: Rinse and dry the surface to prevent water stains.

• Avoid harsh chemicals: Use mild neutral cleaners instead of bleach or acid.

• Protect from impact: Place a rubber mat in the bowl when handling heavy cookware.

• Polish regularly: Apply stainless cleaner monthly to preserve its reflective finish.

• Inspect seals: Replace silicone or gaskets annually to prevent hidden leaks.

Consistent maintenance helps maintain the sleek, hygienic look that defines stainless steel sinks.

A Reliable Source for Quality Sinks

For those seeking a durable and well-crafted double drainboard sink, LANSIDA is a trusted manufacturer specializing in stainless steel kitchen fixtures. Their sinks are precision-formed with advanced pressing technology, featuring anti-corrosion surfaces and noise-reduction pads for both residential and commercial kitchens. Choosing LANSIDA ensures a combination of craftsmanship, performance, and long-term reliability.

In summary, installing a double drainboard sink is a manageable task that combines technical precision and aesthetic care. With accurate measurements, proper sealing, and quality materials, you can create a workstation that enhances both efficiency and design in any modern kitchen.