What is the best angle for a tap on a main?

The best angle for a tap on a main is 45 degrees down from the top of the main. This angle is optimal because it allows for proper water flow and minimizes the risk of creating turbulence or flow restriction in the main line. Tapping at 45 degrees facilitates the gravitational flow of the water into the service line and ensures that the connection remains stable and functional over time. Additionally, this angle helps in aligning the pipe being tapped into with the main, promoting an efficient and secure connection.

Tapping at angles that are either too shallow, such as 30 degrees, or too steep, like 60 degrees or 90 degrees, can lead to complications such as poor flow dynamics and increased chances of sediment buildup at the connection point. Therefore, the 45-degree angle strikes a balance that is less prone to operational issues and optimizes the hydraulic performance of the system.