What is the minimum horizontal slope required for condensate disposal piping?

The minimum horizontal slope required for condensate disposal piping is critical to ensure proper drainage and to prevent issues such as blockages or backups. A 1 percent slope means that for every 100 units of horizontal run, the piping should descend 1 unit vertically. This slight incline is sufficient for allowing condensate to flow by gravity, ensuring that water does not accumulate in the piping and reduces the risk of potential overflow or system failure.

A slope of 2 percent, 3 percent, or 4 percent may be steeper than necessary for effective drainage. While these options might work, a smaller slope minimizes the material and construction requirements while still achieving effective drainage. Therefore, a 1 percent slope is not only compliant with established codes but also represents best practices in system design for condensate disposal.