Installing an Overmount Sink

The most common type of sink you usually see in houses is the one that will rest above the countertop. This is an overmount sink and it might seem difficult to install although it is actually very easy. The good news is that it is so easy to install that the needed skills are just drawing a line, cutting and using a wrench.

If your new sink is to replace the existing one and they both have the same shape and size just start by disconnecting the water supply lines and of course the drain pipe. Watch out for special clips at the bottom of the sink that might hold it in place. If none are found just loosen the sink and lift it up. Eventually also slide a knife blade under the flange if it is stuck with plumber putty.

When utilizing an existing countertop you need to be sure that the holes of the sink for the faucet will be aligned with both the countertop and the faucet. New sinks will usually come with an existing installation template. You just have to place it on your countertop and simply mark the outline in order to start the installation of the new overmount sink. If it did not come with such a template just turn it upside down and you will need to draw a line around its edge. A second line must also appear drawn at around half an inch inside the first line. You need this second one as it is the line you will cut along.

When drilling the hole for the new sink you will probably need 3/8 inch holes at the corners of the outline. Other holes are also needed in order to permit water supply lines to be installed and reach the faucet. Clean around the newly created holes and apply plumber putty to the faucet base in order to attach it to the sink. Attach the water supply lines to the base and keep in mind that the usually come with pressure couplings that can be screwed by hand. You should use a wrench though but be careful to not tighten them too much.

Position the sink into the hole and put the water supply lines through the holes you did earlier. Gently press down on the sink and wipe the extra glue if it appears with a clean cloth. Place the eventual fastening clips that can come with the new sink and then install the sink drain. The S trap must also be attached together with the drainpipe. When all is done turn on the water and check for possible leaks. .

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