What is the term used for the piping that should maintain a minimum slope?

The term that refers to piping that should maintain a minimum slope is condensate disposal piping. This type of piping is specifically designed to carry away condensation produced by HVAC equipment to prevent accumulation and potential water damage. Proper sloping is crucial as it ensures that the condensate flows efficiently towards the drain, preventing blockages and promoting effective drainage.

In contrast, drainage slope piping generally refers to the general concept of sloping drainage pipes but does not specifically address the unique requirements of condensate disposal from HVAC systems. The primary drain piping is usually associated with main drains in plumbing systems, while overflow piping is used in situations like tanks or basins to prevent overflow and does not focus on the same principles of condensate drainage. Therefore, recognizing the importance of maintaining a minimum slope in condensate disposal piping is vital for effective drainage in mechanical systems.