What is the correct angle for all branches connecting to the main water supply system?

In plumbing and water supply systems, maintaining the correct angle for branches connecting to the main supply is crucial for ensuring optimal flow and pressure of the water. The standard practice is to have branch lines entering the main at a 90-degree angle. This design facilitates efficient flow by allowing water to enter the main supply line directly, minimizing turbulence and potential resistance.

When branches connect at angles other than 90 degrees, such as at 45 or 60 degrees, the flow dynamics can be compromised, potentially leading to issues such as reduced water pressure or increased chances of clogs. While some systems may employ other angles in specific situations, the recommended and widely accepted standard for most installations remains a 90-degree angle. This helps to standardize connections within plumbing systems, making it easier to perform maintenance and repairs as needed.