Kitchen Sink Hole - Introduction

Kitchen sinks most commonly have between 1 and 4 holes drilled for use installing kitchen faucets and accessories, and they are rather simply named, sink holes.

3-hole sinks are the most common and are designed to accept a two-handle faucet and its spout. The 1-hole sinks are common as well and can accommodate to a single hole installation featuring a minimalist appearance.

The 4th hole in a 4-hole sink is usually used for an accessory, such as a side spray or soap dispenser, or it can also be used with an air gap for a dishwasher.

The standard diameter for sink holes is 1 3/8 inches, but some faucets and accessories require a 1 1/2 inch hole diameter. You can reference the faucet's specification sheet to see what diameters your project requires.

When the two outer sink holes of 3 (main) sink holes are drilled more than 6 inches apart, measured from the center of the left sink hole to the center of the right sink hole (ignoring the center hole), you will need to look for a widespread faucet. Widespread faucets can be installed on various centers up to 16” apart.

Always be sure to check the depth of the sink, distance between pre-existing holes, and spec on any faucet or accessory to be installed before purchasing or installing a faucet and certainly before drilling a fresh hole.

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