Removing A Kitchen Sink Drain
Let's face it, at some time or other you will have to replace a Kitchen Sink Drain, whether it be because the drain is broken or leaking or simply because it has become unsightly. Removing a Kitchen Sink Drain is easy, just follow the steps I have outlined in this article.
Now for the fun part. By the way you won't need to shut off the water for this part unless you intend to remove the sink at the same time.
First, locate and loosen the nut on the "Trap Adapter". This is what the trap adapter looks like on its own. It comes in a variety of sizes and configurations. You will need to choose the appropriate size and material for your application, should you ever need, to replace it. Drainage pipe is normally made of ABS (black) or PVC (white).
The image on the left shows a double sink; ABS drain pipe with the "Trap Adapters" circled in red. Also show in this image are the basket strainers (located at the top, right next to the sink) and the strainer "tailpiece", just above the trap adapter collar. (Hey, I didn't make this up, this is what it's actually called). By now, you should have a pretty good idea of what the strainers are and how the drain and tailpiece all fits together.
The image on the left shows a complete kitchen sink/utility sink strainer, drain assembly, fully assembled. These come in many different designs and configurations. They are all universal in same size, 3.5" in diameter, and they are all interchangeable. It really does not matter if the one you are replacing is plastic, galvanized, stainless steel or solid brass, they don't have to be identical, they will all work.
Next, you will want to remove/unscrew the tailpiece assembly nut, located just below the strainer basket, see diagram on the left. This will separate the tailpiece nut from the strainer basket assembly.
The next step is to remove the strainer basket "Locknut" by turning it counter clockwise; it's the part that holds the strainer basket tight against the sink, see diagram on the left.
Don't pay any attention to the tip of the needle nose pliers, sticking through, the bottom of the strainer basket. Some people use needle nose pliers to hold the basket and keep it from turning, while trying to unscrew the drain "Locknut".
By the way, there are tools specifically designed for this purpose, they are safer and easier to use, then the method shown in this diagram.
With the strainer "Locknut" removed, you can pull out the strainer basket assembly by lifting it from the upper side of the sink. Once this has been accomplished you will be ready to begin the new task of installing your new kitchen sink strainer basket re-assembly. See my article "How to Install a Kitchen Sink Drain".