When connecting vertical drainage lines, which bend is acceptable?

When connecting vertical drainage lines, a 45-degree bend is often preferred because it provides a smoother transition for the wastewater flow. This is crucial in drainage systems, as sharper bends can lead to increased turbulence and the potential for clogs.

Using a 45-degree bend promotes better flow characteristics, as it reduces the risk of waste material settling or causing back pressure, which can occur with more abrupt changes in direction, such as a 90-degree bend. The smoother transition minimizes the impact of flow resistance, thereby enhancing the overall efficiency of the drainage system.

Options like a 90-degree bend may not facilitate flow as effectively due to the sharper angle, which could lead to maintenance issues over time. While a 1/8 bend and any standard bend could potentially be acceptable under specific circumstances, they are not typically the preferred choice for vertical drainage line connections. The 45-degree bend represents an optimal balance between space considerations and the need for effective drainage flow.