When should packing replacement occur at a water distribution facility?

The appropriate time for packing replacement in a water distribution facility is when no further tightening can be done to the packing gland. This situation indicates that the packing material has reached its limit in terms of adjustments and has likely become worn or damaged. As packing compresses and degrades over time, the ability to tighten the packing gland diminishes, leading to potential issues like leaks. Replacing the packing at this stage is essential to maintain equipment efficiency, prevent water loss, and ensure optimal operation of valves or pumps.

In addition to this, simply replacing packing on a fixed schedule, such as annually or monthly, does not take into account the actual condition of the packing. Moreover, waiting for leaks to occur before replacing packing could result in greater operational disruptions and water wastage, making proactive replacement based on the condition of the packing gland a more effective approach to maintenance.