How to Install a Vessel Sink: A Comprehensive Guide
Materials Required
Equipment / Tools:
- Tongue-and-groove pliers
- Rag
- Hacksaw (as needed)
Materials:
- Vessel sink
- Drain fitting and tailpiece
- Plumber’s putty
- Pipe-joint compound
- Drain trap assembly (1 1/4-inch or 1 1/2-inch, as needed)
Choosing the Right Vessel Sink and Countertop
Vessel sinks, which sit atop a countertop or vanity, can enhance the aesthetics of a bathroom. When selecting a vessel sink, consider the existing countertop and the location of the faucet. If the countertop needs to be replaced, choose a material that complements the sink and allows for proper drainage and faucet installation.
Preparing the Countertop
For a seamless installation, the countertop must have properly sized holes for the sink drain and faucet. Most vessel sinks come with a template for precise hole cutting. If the countertop is made of natural or engineered stone, entrust this task to a professional.
Select a high-spout faucet to avoid the need for a wall-mounted installation. Deck-mount faucets are easier to install before the sink is placed.
Installing the Drain Fitting
Apply plumber’s putty to the bottom surface of the drain flange and insert it into the sink drain opening. Install the tailpiece end of the drain fitting into the countertop cutout. Ensure the drain flange lettering is upright when viewed from the sink.
Securing the Tailpiece
Apply pipe-joint compound to the rubber seal and slide it onto the drain tailpiece. Thread the friction ring and mounting nut onto the tailpiece and tighten by hand. Use tongue-and-groove pliers to further tighten, but avoid overtightening.
Double-check the alignment of the drain fitting and wipe away excess plumber’s putty.
Completing the Drain Assembly
Connect the P-trap to the sink drain tailpiece using a slip nut and washer. Install a trap arm between the P-trap outlet and the branch drain pipe. Adjust the slope of the trap arm towards the drain line. Use a hacksaw to cut the trap arm or add a tailpiece extension if necessary.
Tighten all slip nuts further by hand or with pliers, but avoid overtightening.
Testing for Leaks
Run water into the sink and inspect for leaks beneath the sink. Fill the sink to capacity for a thorough test. Minor leaks at slip nuts can be resolved by tightening them slightly.
If water leaks around the sink base or rubber seal, disassemble the drain and ensure the drain fitting is properly seated in the sink’s drain opening.
Troubleshooting Tips
- Use a mounting ring or gasket to seal the sink to the countertop.
- Apply silicone caulk to the bottom of the sink for added stability.
- If the drain tailpiece and P-trap are different sizes, use a reducer fitting.
- If the sink is round-bottomed, have a helper hold it in place while attaching the drain fitting.