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Buying guide

Bar and prep sink guide

Shop Design Build · updated 2026

A stainless undermount bar sink with a bar faucet

A second, smaller sink takes pressure off the main sink. In a busy kitchen it lets two people work at once; in a bar or butler's pantry it keeps drinks away from the dishes.

Prep sink or bar sink?

A prep sink sits in the island or on the cooking side of the kitchen for rinsing vegetables and filling pots. A bar sink sits in a beverage area, basement bar or butler's pantry for ice, glasses and drinks.

Common sizes

Most are 12 to 24 inches wide. A 15 to 18 inch prep sink is big enough for a colander and a pot; a 12 to 15 inch bar sink is plenty for glasses. Check the base cabinet width the sink needs before you order; our sink cabinet fit tool helps.

Drains and disposals

Some small sinks have a 2 inch drain that will not take a disposal. If you want a disposal at the prep sink, choose one with a standard 3.5 inch opening. See the disposal guide.

Placement

Put a prep sink between the fridge and the range so the work flows. Keep a bar sink out of the main cooking zone so guests can help themselves.

Faucets

Bar faucets are smaller but often have a tall, high-arc spout for filling pitchers. A pull-down bar faucet is handy at a prep sink. Match the finish to the main faucet or use it as an accent.

Common questions

How big should a prep sink be?

Around 15 to 18 inches wide works for most kitchens.

Can a bar sink have a garbage disposal?

Only if it has a standard 3.5 inch drain opening.

Where should a prep sink go?

Usually in the island or between the fridge and the range.

Related: bar and prep sinks, kitchen island guide, workstation sinks, undermount sink ideas.

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