How often should a horizontal vent pipe be supported?

Supporting a horizontal vent pipe is crucial for ensuring safety and proper operation, as it prevents sagging and potential blockages that could lead to venting issues or system failures. In general, the recommended practice for supporting horizontal vent pipes is to provide support at intervals that prevent excessive sagging.

The correct interval for supporting a horizontal vent pipe is every 5 feet. This distance is established to balance the structural integrity of the vent system with practicality, aiming to minimize the risk of stress on the joints and connectors. Adequate support helps maintain the proper slope for drainage and reduces the likelihood of condensation buildup within the pipe, which can lead to corrosion or blockage.

While other distances might be considered for specific applications or materials, the 5-foot interval is a standard guideline recognized in HVAC practices, ensuring that the piping remains stable and functions effectively over time.