Installing a new sink and faucet can seem like a daunting task, but with proper planning and preparation, it can be a relatively straightforward DIY project. Replacing old, worn-out, or outdated fixtures is a great way to update the look and function of your kitchen or bathroom. Following some key steps and safety precautions will ensure the job goes smoothly from start to finish.
Gather the Necessary Materials
Before starting any work, make sure you have all the necessary supplies and tools on hand. Here’s what you’ll need:
- New sink basin
- New faucet
- Supply lines and shut-off valves
- Drain assembly and p-trap
- Plumber’s putty or silicone caulk
- Adjustable wrenches
- Channel lock pliers
- Bucket
- Flashlight
- Safety glasses
Make sure the new fixtures you purchase are designed to fit your existing sink base cabinet and countertop cut-out. Measure carefully to ensure proper sizing. If you’re changing sink types, some cabinet modifications may be required.
Prepare the Work Area
Clear the area around and under the existing sink to allow plenty of room to work. Remove everything from under the sink and lay down towels or drop cloths to protect cabinetry and floors from potential drips or spills during the process. Turn off the main water supply lines and turn on the faucet to release any built-up pressure. Disconnect and drain the p-trap under the sink to remove any standing water.
Have a bucket ready to catch water remaining in the supply lines. Unscrew the supply lines from the old shut-off valves or compression fittings. Briefly turn the valves on to drain the lines into the bucket, then turn back off.
Remove the Existing Fixtures
Removing the old sink and faucet requires disconnecting the drain assembly and unsecuring the sink from the countertop. Start by:
- Disassembling and removing the p-trap and drain tailpiece. You may need to loosen slip-joint nuts with channel locks.
- Disconnecting the drain pipe from the sink strainer. Unscrew or cut through any caulk or putty seal.
- Detaching the faucet. Remove any mounting hardware, decorative trim, and supply line connections.
- Checking for any remaining screws, bolts, or clips securing the sink itself. Remove as needed.
With the sink detached, lift it out carefully to avoid damaging the countertop. Scrape away old caulk, putty, or silicone from the top mounting edge using a putty knife. Clean the area in preparation for the new sink.
Install the New Faucet
It’s easiest to mount the new faucet to the sink before putting the sink in place. Refer to the manufacturer’s instructions for specific mounting details. In general:
- Set the sink on a cushioned surface upside-down.
- Apply a bead of plumber’s putty or silicone to underside of the faucet base.
- Align and press the faucet into the prepared faucet holes in the sink.
- Secure with the provided mounting nuts, washers, and screws underneath.
- Wipe away any excess putty that squeezes out.
Connect the supply lines and drain components like P-trap, tailpiece, and strainer as directed. Don’t fully tighten yet. Leave these hand-tightened for final adjustments later.
Position and Install New Sink
You’re now ready to set the sink in place. Be sure to have help lifting and maneuvering if it’s large or heavy.
- Clear away any debris or obstacles from the cabinet and countertop.
- Apply a generous bead of silicone caulk around the top of the sink rim or flanges.
- Carefully set the sink in place, aligning with the cut-out area. Press down firmly to adhere the caulk seal.
- From underneath, re-install any mounting clips, screws or brackets to secure the sink. Tighten by hand first, then with a wrench if needed.
If the sink came with a decorative trim or apron, attach it now per the manufacturer instructions.
Connect Supply Lines and Drain
With the sink solidly in place, complete the connections:
- Attach supply lines from shut-off valves to faucet inlets. Tighten with wrenches.
- Connect drain P-trap. Hand tighten slip joints first before wrench tightening.
- Attach drain tailpiece to sink strainer. Tighten mounting nut.
- Connect tailpiece to P-trap and outlet drain pipe.
- Ensure all joints and connections are water-tight. Tighten further if needed.
Turn the hot and cold shut-off valves back on slowly. Check for leaks and tighten any connections if necessary. Briefly run the faucet to flush lines. Verify proper drainage.
Caulk and Seal the Sink
A water-tight seal between the sink and countertop is crucial. Apply a smooth, neat bead of silicone caulk around the rim where it meets the countertop. Use your finger to spread and smooth the caulk evenly. Remove any excess.
Allow the caulk to fully cure overnight before using the sink. Verify no leaks once you begin regular use. Reapply caulk if needed to reinforce the seal.
Tips for a Successful Installation
- Turn off water supply before beginning. Avoid cross-threading connections.
- Follow manufacturer’s instructions for all mounting and installation steps.
- Make sure the sink fits the existing cut-out before removing old sink.
- Use leak-proof plumber’s putty for faucet base seals. Smooth out for a neat finish.
- Adjust supply line angles as needed to align properly. Hand tighten connections before wrench tightening.
- Support bottom of sink evenly when lifting. Take care not to crack or chip the sink.
- Caulk generously around the sink’s edges for a watertight seal to countertop.
Common Questions about Installing New Sinks and Faucets
How do I remove an old stubborn faucet?
- Try spraying lubricant around the faucet base and waiting 10 minutes to penetrate.
- Use a basin wrench to reach up inside and loosen the mounting nuts.
- Cut through caulk seal with a utility knife before attempting to pry off.
What is the best way to cut the countertop for an undermount sink?
- Use the sink itself as a template to trace cut lines.
- Carefully cut the opening with a specialty saw like a jigsaw. Go slowly.
- Use a router and bit to smooth and polish cut edges.
Should supply lines have rubber washers or plastic gaskets?
- Plastic gaskets form better seals than rubber washers.
- Replace washers with gaskets when installing new supply fixtures.
- Ensure gaskets are properly seated in fittings before tightening.
How can I remove old silicone caulk for a clean installation?
- A plastic putty knife helps pry up old bead. Go slowly to avoid damaging surfaces.
- Rub firmly with denatured alcohol to remove sticky residue after prying up caulk.
What is the best material for the drain pipe under a bathroom sink?
- PVC is recommended, as it is durable, leak proof, and easy to assemble.
- Avoid chrome for drains, as it corrodes over time leading to leaks.
Conclusion
Installing a new sink and faucet upgrades your space both functionally and aesthetically. Careful planning and a methodical approach will ensure the project goes smoothly and the end results look great. Follow all safety procedures, take your time, and don’t hesitate to call a professional if plumbing complexities arise. With some patience and the right techniques, you can complete this project DIY and save on installation costs. Just be sure to seal properly for leak protection afterwards. Enjoy your updated look and renewed convenience with a fresh new sink and faucet combination.