The following are guidelines on how to install a new kitchen sink. However, always follow manufacturer's instructions for your particular model.
1.
Position the Basin
Make a line on the countertop indicating the centerline of where the sink will be positioned. If the basin is self-rimming, place it upside down and centered on the reference line. Trace the outline of the sink onto the countertop, and then remove the basin. Draw a cutting line offset to the inside of the outline. To find the offset dimension for the cutout, read the manufacturer’s literature. (Fig. 1)
If the basin has a metal rim, lay the rim on the counter, and use it as a template to trace the cutout. Drill 1/4-inch holes at the corners to create an outline of the cutout on the reverse side of the countertop.
2.
Add Supports
If the countertop consists of two layers of 3/4-inch plywood or solid-surface material, bracing may not be necessary. If braces are necessary, install them beneath the countertop along the side edges of the sink. (Fig. 2)
3.
Cut the Opening
Cut the openings for the sink using either a saber saw or a keyhole saw (Fig 3). For a ceramic-tile finish, be sure to cut the opening before setting the tiles on the countertop.
4.
Install the Sink
If the sink is self-rimming, it can be installed on any countertop. Once the opening has been cut (see Step 1), place a bead of silicone caulk on the countertop where the rim will go. Position the sink carefully over the opening, and press it firmly down into the sealant. Under the sink, insert the metal clips provided, and then tighten each clip screw part of the way. Gradually tighten them enough to hold the sink securely in place. Run a wet finger along the rim to shape the caulking. Afterward, remove any excess sealant from the countertop.
If the sink is metal-rimmed, place a bead of silicone caulk around the cutout, and then set the rim into it. While someone pushes the sink up from below, tighten the clips. If you’re working alone, suspend the sink with 2x4s. Lay one 2x4 across the sink opening. Tie a short rope around it, and thread the rope down the sink drain. Tie the loose end around another 2x4, bridging the underside of the sink. Before tightening the rope, place a bead of caulk between the sink edge and the metal rim. Tighten the rope, twisting it with a screwdriver, to pull the sink to the rim. Finally, tighten the clips below and wipe away excess caulk. (Fig. 4)
