How to Install a Bathroom Sink Drain

Installing a bathroom sink drain is a straightforward home improvement project that involves removing the old drain and replacing it with a new one. Here are the steps on how to install a bathroom sink drain:

Tools and Materials Needed:

- Adjustable wrench

- Channel-type pliers

- Plumber's putty

- Slip-joint pliers

- Putty knife

- New sink drain assembly (with flange, gasket, and strainer)

Step-by-Step Instructions:

Step 1: Prepare the Work Area:

- Turn off the water supply valves beneath the sink.

- Place a bucket under the sink to catch any dripping water.

Step 2: Disassemble the Old Drain:

- Use the adjustable wrench to loosen the slip nut connecting the drain pipe to the sink drain flange.

- Remove the old drain assembly, including the flange and gasket, by gently pulling it down through the sink drain hole.

Step 3: Clean the Drain Area:

- Clean the sink drain hole and the surrounding area thoroughly to remove any debris or old sealant.

Step 4: Apply Plumber's Putty:

- Roll a piece of plumber's putty into a rope about 12 inches long and 1/4 inch thick.

- Place the putty around the underside of the sink drain flange, creating a seal to prevent leaks.

Step 5: Insert the New Drain:

- Insert the new drain assembly through the sink drain hole from above.

- Gently push the drain down until the flange rests against the underside of the sink.

Step 6: Secure the Drain Flange:

- Reach under the sink and place the rubber gasket over the drain pipe.

- Hand-tighten the slip nut onto the drain pipe to secure the drain assembly in place.

- Use the adjustable wrench to tighten the slip nut until it is snug, but do not overtighten.

Step 7: Attach the Strainer:

- Screw the strainer onto the threaded end of the drain assembly from the top side of the sink.

- Tighten the strainer until it is snug, but be careful not to overtighten and damage the threads.

Step 8: Turn on the Water Supply:

- Turn on the water supply valves beneath the sink.

- Check for any leaks around the drain assembly and tighten any loose connections if necessary.

Step 9: Test the Drain:

- Turn on the faucet and let the water run for a few minutes.

- Check for any leaks or clogs in the drain. If everything seems to be working properly, you've successfully installed your new bathroom sink drain.

Remember, if you're uncomfortable working with plumbing or encounter any issues during the installation, it's best to seek professional help from a qualified plumber.