What trap size is necessary for a three-compartment sink?

In the context of plumbing for a three-compartment sink, the appropriate trap size is typically determined by the combined drainage needs of the sink. A two-inch trap is necessary for a three-compartment sink because it provides adequate flow capacity to handle the volume of wastewater that a three-compartment sink generates during operation, especially in commercial settings where multiple dishes are washed simultaneously.

Using a two-inch trap allows for effective drainage without potential clogs or backups, while still complying with plumbing codes that are designed to ensure proper drainage and ventilation. A larger trap, such as a three-inch or four-inch trap, would be unnecessarily large for the application and could lead to a slow drainage issue or other complications. Similarly, a smaller trap, such as a one-and-a-half-inch one, may not provide sufficient capacity and could result in drainage problems. Therefore, a two-inch trap is the suitable choice for managing the wastewater from a three-compartment sink effectively.