For fixtures draining to an acid waste system, what should be the minimum trap seal depth?

In the context of an acid waste system, the minimum trap seal depth is set to ensure proper functioning and maintain a barrier against gases and odors from the drainage system. The correct minimum trap seal depth of 50 mm is designed to handle the acidic nature of the waste while preventing the loss of the seal due to evaporation or siphoning.

A trap holds a specific volume of water (the trap seal) to create a barrier against foul gases and unpleasant odors entering the building. For systems dealing with hazardous materials like acidic waste, a deeper trap seal is necessary to ensure that even if some of the water evaporates over time or is moved due to other conditions, there is still enough liquid present to maintain that crucial seal.

Deeper trap seals also help accommodate the potential foaming or splashing from the discharge of acidic wastes, ensuring that the trap does not become ineffective. Therefore, 50 mm is established as the minimum depth to strike a balance between effectiveness in maintaining a seal and operational efficiency in the unique conditions of acid waste drainage systems.