How is the waste system for a grease interceptor vented?

The waste system for a grease interceptor must be vented independently through the roof to ensure proper air circulation and prevent the accumulation of sewer gases within the building. This venting method allows for effective drainage of the waste and avoids potential blockages that can occur if the system is vented through walls or inadequate heights.

By venting through the roof, the grease interceptor can efficiently release gases that can form inside the interceptor as organic materials decompose. This type of venting also helps to maintain the necessary atmospheric pressure, allowing for smooth flow in the waste system and reducing the risk of sewer gas entering the building.

Venting through a wall at a height no higher than 48 inches would not provide sufficient clearance for gas escape and could lead to safety hazards, while venting at the vent stack increaser might not adequately address the need for independent venting to the exterior atmosphere. Therefore, independent venting through the roof is the correct method for ensuring the safe and effective operation of a grease interceptor's waste system.