Modernizing Your Kitchen Sink? How to Plumb a Single Drain Sink

Is your kitchen in need of a little modernizing? Upgrading from a double basin sink to a sleek new single drain sink is an easy project that can completely transform the look and feel of your kitchen.

Single drain sinks provide a contemporary style while also allowing more room for washing those oversized pots and pans. But switching out your existing double sink for a solo one requires replumbing work. Here we'll walk through the entire process of installing and plumbing a single drain sink step-by-step.

Step 1 - Selecting the Right Single Drain Sink

When choosing a single basin sink, first consider the overall size and dimensions. Measure your existing countertop sink cutout and shop for a single bowl sink that will fit the space. Also look at the depth - deeper sinks around 10 inches provide more functionality for washing dishes.

Next, decide on the ideal material. Stainless steel is a popular choice that pairs well with most kitchen designs. Enameled cast iron sinks offer a range of color options but can be heavy. Composite sinks are lightweight and durable.

Be sure to choose a sink made to work with your current faucet and plumbing setup. Undermount sinks install beneath the counter while drop-in sinks sit on top. Coordinate all the pieces before making a purchase.

Step 2 - Removing the Existing Sink

Start by turning off the hot and cold water supply valves below the sink. Then disconnect the drain pipes and P-trap along with the dishwasher hose if applicable. Unplug the garbage disposal and disconnect it from the sink drain.

Check for any remaining connections securing the old sink like clips, screws or sealant. Remove these completely so you can lift out the sink. Thoroughly clean the countertop area and sink base cabinet to prepare for the new sink.

Step 3 - Preparing the New Sink

Do a dry test fit to ensure your new single bowl sink slides cleanly into the existing cutout. If needed, use a countertop or jigsaw to gently modify the dimensions. When ready, give the sink a thorough cleaning.

Apply a steady bead of plumber's putty around the rim of the sink. This seals the edges and prevents leaks. Carefully lower the sink into the opening, pressing down firmly to adhere the putty.

Step 4 - Installing the New Single Drain Sink

For undermount sinks, use the mounting clips provided with the sink. Tighten these gradually while checking that the sink remains level. Don't over tighten as this can cause the counter surface to crack.

For drop-in sinks, set the sink in place and attach from below using a silicone sealant adhesive around the edges. Let the sealant fully cure before using the sink.

If needed, attach the drain assembly to the sink before connecting the plumbing. Follow the manufacturer instructions for your specific model.

Step 5 - Adapting the Plumbing

Adapting your existing plumbing lines to work with the new single drain sink is the trickiest part. Assess the current setup - measure pipe lengths and positions.

You may need to purchase new pipes, elbow joints, couplings and other fittings to connect the drain to the disposal and disposal to wall. Use slip joints to allow slight adjustments as you fit the parts together.

Step 6 - Reconnecting Supply Lines

Attach the hot and cold water supply lines to the sink faucet using compression fittings for a leak-free seal. Make sure the lines aren't kinked or twisted.

Turn on the water supply and check for any drips. Tighten fittings further if needed. Turn off water and disconnect supply lines again before final sink hookup.

Step 7 - Testing for Leaks and Drainage

With the sink in place and plumbing adapted, complete the connections. Attach supply lines, drain pipes and disposal. Seal any gaps below the sink with plumber's putty.

Turn on the water supply and thoroughly check for leaks at all joints, valves and pipe connections. Verify that the sink drains smoothly without any blockages or gurgling.

Run the garbage disposal and check beneath to confirm no leaks. Make any final adjustments before moving on.

Step 8 - Finishing Touches

Install the new faucet, soap dispenser, towel ring or any other accessories for your sink. Use plumbers putty when securing pieces directly to the sink.

Run water into the sink and check one more time for leaks. Also verify proper drainage. Use silicone sealant to fill any visible gaps around edges of the sink.

Finally, clean the countertop and new sink thoroughly. Your single drain sink is ready for easy and efficient washing!

• Always turn off the main water supply before beginning.
• Wear protective gloves and eyewear when handling plumbing.
• Label parts carefully to avoid confusion during reassembly.
• Take before and after photos for potential issues.
• Have additional fittings available for unforeseen needs.
• Be ready to make extra trips to the hardware store.

Installing a new single drain kitchen sink takes some planning and adaptation of plumbing lines. But take it step-by-step, and you can upgrade your kitchen with a contemporary solo sink ideal for large dishes.