When you are installing a kitchen sink drain pipe along with the drain attachment on the floor, you will need to be able to fit the drain and the parts together. In order to do this, you will have to attach the drain to the s-trap below your sink, where it falls into the floor, including applying putty and putting drains into the base of the sink, adding the tailpiece, and then fitting the t-fitting onto the bowl. Installing the kitchen sink drain to your sink is not too difficult, and you should be able to get this job done during a weekend by following some simple instructions.
Step 1 - Adding the Sink Drains
Begin your installation by adding the sink drain strainer into the bottom of the metal sink. Add the two washers that come with your strainer kit to the bottom of the strainer, and then add the nut to keep them in place. Apply a small edge of putty to the strainer, and then push it down into the hole in the sink. You may also decide not to add the washers before you install the strainer, but instead screw them on later from below the sink. The latter may assist you in getting a closer installation to your sink.
Step 2 - Adding the Tailpiece
Once you have fitted the strainer, you can then add the tailpiece. This is a part of the sink which attaches the strainer to the pipes, and needs to be installed closely into the sink. The pipe may be too long to fit comfortably under the sink, in which case you should cut it off using a handsaw or similar tool.
Once you have it fitted correctly, you can then attach a pipe nut onto the edge of the tailpiece. The threaded edge of the nut should face the strainer, and you should also add a single pipe washer over the ends of the tailpiece, and then secure it to the bottom edge of the strainer, using your hand at first and then tightening using a wrench.
Step 3 - Add the T-Trap
When the tailpiece is tightly into place, you should then attach the P trap to the pipe. Add a washer to the beginning of the trap, and then push it into place by tightening it up with your wrench. You may also need to use the pliers to tighten this piece up, as the tailpiece and the trap sometimes do not come together very smoothly. Use a nut to secure the trap to the tailpiece, and then add another washer and nut to the bottom end of the trap. This will be used to attach it to the drain side of your installation. Add caulking around the edges of the pipes and leave to dry.