Plumbing a single sink into a double sink cabinet might seem daunting, but with the right steps and a bit of patience, you can complete this task like a pro. Let’s dive into the process, breaking down each step to ensure a smooth and effective result.
Before we begin, ensure you have the necessary tools and materials. You’ll need a basin wrench, Teflon tape, new supply lines, plumber’s putty, silicone sealant, a hacksaw, utility knife, and, of course, a single sink that fits your double sink cabinet.
Preparation and Planning
Before you start any physical work, measure your new sink and the space in your cabinet. Ensure that the single sink fits perfectly into the double sink layout without any issues. Also, take note of your current plumbing lines to provide a template for your new setup.
It’s crucial to turn off both the water supply and the main water valve before starting any work. This step ensures your safety and prevents any water damages during the process.
Removing the Old Sink
First, disconnect the water supply lines and the drain pipes from both sinks. Use your basin wrench for this task as it provides better leverage in those tight spaces. Once disconnected, carefully remove the old sinks from the countertop and cabinet.
After removing the old sinks, clean the area and remove any remaining caulk or plumber’s putty with a utility knife and some mineral spirits. This step ensures a clean surface for your new sink.
Installing the New Sink
Position your new single sink into the cabinet, ensuring it’s level and centered. Use the old sink’s mounting holes as a template to mark where you’ll need to drill new ones for your new sink.
Drill the new mounting holes with a hole saw or a step bit, ensuring they’re clean and smooth. Apply plumber’s putty around the bottom of the sink’s drain hole, then press the sink into place. Secure it with the new mounting nuts and bolts.
Plumbing the New Sink
Now that the sink is securely in place, it’s time to connect the water supply lines and the drain pipe. Start by cutting the supply lines to the appropriate length using a hacksaw. Don’t forget to add a bit of extra slack to allow for future adjustments.
Wrap the threads of both the faucet supply lines and the shutoff valves with Teflon tape to prevent leaks. Then, screw the supply lines into the faucet tailpieces and the shutoff valves. Hand-tighten as much as possible, then give each connection an extra quarter to half turn with a wrench to ensure a tight seal.
Connecting the Drain Pipe
Connect the new sink’s drain tailpiece to the cabinet’s drain trap. If your double sink cabinet has a low profile, you might need to use a double sink drain assembly instead. Be sure to use a P-trap to maintain a water seal and prevent sewer gases from backflowing into your kitchen.
Use your basin wrench to tighten the slip nuts on the trap and the tailpiece. Ensure the trap is level and securely attached. Once everything is tight, turn the water supply back on and check for leaks.
Finishing Touches
Apply a bead of silicone sealant around the bottom of the sink, where it meets the countertop. This step prevents water from seeping underneath the sink and causing potential damage. Wipe away any excess sealant with a damp cloth.
Let the sealant cure as directed by the manufacturer before using the sink. Finally, install your new faucet, and your single sink is now ready for use.
Congratulations! You’ve just successfully plumbed a single sink into a double sink layout. With a bit of planning and patience, you’ve achieved a professional-looking result. Don’t forget to test your new sink thoroughly before declaring the job done.
