How to Add a Sink Drain to a Basement Bar

Lead Image
  • 48-72 hours
  • Intermediate
  • 120-200
What You'll Need
Drain pipe
.75x.50-inch reduced T-fittings
.50-inch supply pipes
1.5-inch vent pipe
Angle stop shutoff valves

If you are building a basement bar, chances are you want a sink for washing glasses or adding water to mixed drinks. It can also be a nice spot to store ice during a party.

You can build something simple to house the sink, or you can really make something of your bar by staining the wood in a rich color, adding stools, and buying fancy glasses. You can add your own sink drain to a basement bar by following these easy steps.

Step 1 - Turn off Water and Power Supply

Turn off your water supply before doing any plumbing. As an added precaution, turn off the power supply at your breaker box as well, especially if you’ll be doing electrical work, such as adding lighting over the bar or installing a plug beneath it.

Step 2 - Plan Your Rough-In

Plan the bar location for your rough-ins. You might have to break up some of the concrete floor to run your drain line. Rent the necessary tools for that task.

Step 3 - Run Drain Pipe

Run your drain pipe from the location where your sink will be to the main stack or other vent pipe. You might have to cut into the concrete floor, breaking up a section for installation.

Step 4 - Check Local Code

Check your local code to learn the required drain stub-out height. It is commonly 19-inches above the floor. Generally, codes for basement bars require that the ventilation for your sink must be within 3.5-feet of the drain trap.

If you have a vent pipe within that distance, it will act as both drain and vent for the sink. If you don’t, you’ll have to put in a 1.5-inch vent pipe that stretches over closest suitable vent. This new vent pipe should reach at least than 6-inches above the sink’s flood level before it turns to make its straight run.

Step 5 - Tap in for Hot and Cold

Find the nearest water distribution lines and tap into them using .75x.5-inch T-fittings. Run .5-inch supply pipes from these fittings to the sink site.

Step 6 - Complete Stub-outs

Finish the supply stub-outs by using angle stop shutoff valves on each of your supply pipes. The stub-outs should be 8-inches apart.

Step 7 - Build Your Cabinet

Build your bar or cabinet around the plumbing. Measuring for your chosen sink.

Step 8 - Install Counter and Sink

Follow the manufacturer’s installation guide to add a sink to the existing plumbing. Test the water temperature and adjust it if needed. Check for any leaks and fix them if they occur.