When battery venting laboratory sinks, every branch waste exceeding what measurement must be individually vented?

The correct answer, indicating that every branch waste exceeding 10 feet must be individually vented, aligns with established plumbing practices that focus on maintaining proper drainage and venting systems within buildings. In plumbing design, venting is crucial to ensure that there is a continuous air flow in waste pipes, which prevents siphoning of water from traps and helps maintain neutral pressure in the system.

When a branch waste exceeds 10 feet in length, the potential for drainage issues increases due to the longer distance the wastewater must travel. This length can create more significant pressure differentials in the system, leading to potential problems such as slow drainage or back pressure that could affect the traps. Venting these longer branch lines individually ensures that air can enter the system at the correct points, allowing for efficient drainage and reducing the risk of negative impacts on the overall plumbing system.

By requiring individual venting for branch wastes over this length, the code aims to enhance the performance and safety of the plumbing system, ultimately minimizing the chances of blockages and enhancing user experience in laboratory settings.