What fixture is commonly known as a "Service sink"?

A service sink is commonly referred to as a utility sink. This type of sink is designed for various cleaning and utility purposes, such as washing equipment, mops, and other cleaning supplies. Utility sinks are typically deeper and more robust than standard kitchen sinks, allowing them to handle larger cleaning tasks effectively.

In this context, the three-compartment sink is not synonymous with a service sink. Instead, three-compartment sinks are primarily used in commercial kitchens for washing, rinsing, and sanitizing dishes and utensils, adhering to health and safety regulations for food preparation. The focus of a three-compartment sink is on dishwashing rather than general utility tasks.

The floor sink is another type of plumbing fixture designed for draining liquid waste and is commonly found in commercial spaces like restaurants or service stations. It is not a sink meant for washing items but rather functions as a drainage point.

The two-compartment sink serves a similar role as the three-compartment sink but is used for washing and rinsing instead of sanitizing. It lacks the third compartment necessary for a complete dishwashing procedure.

Therefore, a utility sink is the most appropriate answer for a fixture commonly known as a "service sink," as it best fits the definition and purpose of such a fixture.