Sinks exist in two basic styles: self-rimming (also referred to as drop-in or surface-mounted) and under-mount sinks.
If your countertop material is not completely solid, be it plastic laminate or tile, then the style of your sink is drop-in or self-rimming and is set on the surface of the countertop.
Replacing that scruffy-looking old kitchen sink with a lovely new one is easy and can be done on your own.
Drop In Sinks: Dimensions
When purchasing the new sink, the only important thing is that the dimensions of the drop-in are the same and that the right number of sinkholes is available for the faucet.
Ensure the water supply is turned off before you begin any disconnection.
Once you have confirmed the water supply is shut, use an adjustable wrench to disconnect the cold and hot water connections.
Use channel-type pliers to detach the drain trap from the waste drain of the sink.
Remove the old caulking with a suitable tool. Then carefully remove the sink while the faucet is still attached to it.
Ready the Sink Opening
After the sink and faucet have been removed, it will closely resemble a gaping hole. Don't panic - it is at this point that the new sink should be prepared for installation.
Scrape the remaining caulking carefully using a putty knife and wipe the area clean using a home surface cleaner.
Drop In Sinks: Fix the Faucet
While the sink is removed, easily reach out to the back to thread the plumbing lines of the faucet through the sinkholes and attach the faucet tightly to the sink.
After attaching the faucet assembly to the sink, it's now time to prepare the sink itself.
With the sink positioned upside down, apply a bead of silicone caulk round all edges of the sink.
Ensure to apply the caulking close to the sink's exterior edge so that it will make contact with the countertop completely when installed.
Then, carefully place the sink and the fitted faucet assembly in an upright position.
Take note that the sink may be heavy, and try not to spoil the caulking you had done already.
Carefully drop the sink in place.
As soon as the sink has been positioned, you'll need to allow it dry properly against the countertop.
In some cases, special mounting clips are used to hold some sinks tightly against the countertop.
These clips attach the sink to the countertop as they are tightened down, producing a self-rimming seal.
Wipe off any caulking which may have come off the sink base edges as it was being tightened.
Last Plumbing Connections
After the caulking dries off, fix the sink strainer. Otherwise, if you own a garbage disposer, fix its mounting ring and sink flange.
The sink basket/strainer assembly and disposer sink flange will be similarly mounted.
Close the opening of the sink with a half inch bead of plumber's putty round it.
Position the new sink strainer assembly or disposer sink flange in the opening of the drop in sink and hold it tightly against the plumber's putty.
Tighten the flange from underneath the sink until the putty begins to squeeze out.
Connect the water supply and waste drain lines.
Confirm all threaded connections are properly tightened and plumber's tape is used to prevent leaks.
Turn the water supply back on, and observe any leaks. Correct them, if any.
After making the plumbing connections, connect the garbage disposer to the electrical outlet and carry out a test to ensure it's working properly.
You're all set, and can now enjoy your nice new drop sink and faucet installation!