What is the minimum number of units horizontal for the slope in condensate piping?

The minimum requirement for the slope in condensate piping is determined by the need to ensure proper drainage and avoid any potential blockage or standing water in the piping system. A slope of 12 units horizontal for every unit of vertical rise enables gravity to effectively draw condensate away from the equipment toward the designated drainage point, minimizing the risk of moisture accumulation and water damage.

This specific ratio allows for effective drainage, as it strikes a balance between adequate slope to facilitate flow and practicality for installation. If the slope is too steep, it can lead to increased velocity and potential damage to the piping system, while a slope that is too gentle might result in insufficient drainage. Therefore, adhering to the 12-to-1 minimum slope guideline ensures efficient operation of the condensate drainage system.