What size vent is required for a waste oil tank?

The requirement for a 2-inch vent for a waste oil tank is based on the need to effectively handle the volume of air and venting necessary as the tank fills and empties. A 2-inch vent size is typically sufficient to allow for the dissipation of vapors while preventing negative pressure that could disrupt the flow of oil. Additionally, a vent of this size ensures that adequate air is allowed into the tank to facilitate proper operation, reducing the risk of creating a vacuum that could impede filling or result in structural damage to the tank.

Choosing a vent that is too small could lead to operational issues such as slow filling times or potential spills, while a vent that is excessively large may not be required for typical waste oil applications. Therefore, specifying a 2-inch vent aligns with regulatory standards and operational efficiency for waste oil tanks.