When installing more than one riser to the hot water supply main, the most typically used connection type is the

When installing more than one riser to the hot water supply main, the most typically used connection type is the

• A. 90-degree
• B. 60-degree
• C. 45-degree
• D. 30-degree

Answer: (C)

When you tap off a hot water main to feed more than one riser, a gradual branch angle is preferred to keep the flow smooth and predictable. A 45-degree branch provides a gentle transition from the main to each riser, which helps minimize turbulence, reduces pressure losses, and lowers the risk of water hammer. It also makes it easier to lay out multiple risers around the main without crowding or creating sharp turns. A sharp 90-degree turn would introduce more turbulence and stress at the fittings, increasing friction loss and potential vibration or damage over time. Angles like 30 or 60 degrees are less standard for this purpose because they don’t offer the same practical balance between flow efficiency and ease of routing for multiple branches, making 45 degrees the typical choice.

When you tap off a hot water main to feed more than one riser, a gradual branch angle is preferred to keep the flow smooth and predictable. A 45-degree branch provides a gentle transition from the main to each riser, which helps minimize turbulence, reduces pressure losses, and lowers the risk of water hammer. It also makes it easier to lay out multiple risers around the main without crowding or creating sharp turns.

A sharp 90-degree turn would introduce more turbulence and stress at the fittings, increasing friction loss and potential vibration or damage over time. Angles like 30 or 60 degrees are less standard for this purpose because they don’t offer the same practical balance between flow efficiency and ease of routing for multiple branches, making 45 degrees the typical choice.