All commercial garage drains shall be a minimum size of how many inches?

The minimum size for all commercial garage drains is established at 4 inches. This requirement is primarily driven by the need to efficiently handle large volumes of water and potential contaminants that may enter the drainage system from vehicles and cleaning activities.

A 4-inch drain provides adequate flow capacity to manage stormwater and wastewater without the risk of backup or overflow, which is crucial in commercial settings where heavy use is common. Smaller drain sizes may become obstructed more easily or may not accommodate the amount of drainage typically produced in these environments. Adhering to this standard is essential for promoting safety and maintaining proper functionality within commercial garage facilities.