Mounting Choices
The plumbing for a new sink is fairly straightforward — there's not a lot of choice involved. But how and where the sink is attached to the countertop is a decision you'll need to make before you order your new basin.

Self-rimming sinks (see image 2) are easiest to install; most take about an hour. Lighter sinks, such as stainless-steel or composite models, are secured to the counter with clips and screws. Heavy cast-iron sinks are held in place by their weight.

A few stainless-steel and enamel-on-steel sinks are held in place by a separate steel rim (see image 3). However, you wind up with two seams where muck can accumulate.

Undermount sinks (see image 4) are popular because they're sleek looking, make wiping off the counters into the sink a breeze and allow you to combine bowls of different shapes and sizes. However, undermounts often take at least twice the time to install as self-rimming models. They also require solid materials, such as granite or solid surfacing, since the counter material is exposed.
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