What is the minimum waste opening size required on a laundry sink?

The minimum waste opening size required on a laundry sink is 1 1/2 inches. This size is specified in plumbing codes to ensure adequate drainage for the waste generated by washing clothes, which can include lint, soap, and various other materials. A waste opening of this size helps prevent clogs and allows for efficient drainage, accommodating the volume of water and debris that may be present during constant use, such as when washing bulky items or multiple loads.

Larger sizes may be specified for specific installations or requirements, but the 1 1/2 inches is generally recognized as the standard minimum for typical laundry sinks. This standard reflects a balance between functioning effectively and fitting within typical plumbing systems, making it crucial for maintaining both hygiene and functionality in laundry areas.