As we know, the presence of air pockets in the closed loop pipe system, like we routinely find in hydronic heating and cooling systems, lowers its overall system performance. Air pathways through such a system are via many pathways such as through pipe joints, valves, leaky coils, etc. So, it is important to properly flush such systems and treat them with chemicals when there is a leak detected in the system.

If the system is not flushed/treated properly after a leak is detected in the system, oxygen present in the air bubbles forms pockets and corrodes the piping leading to the formation of sediments/sludge in the system. Oftentimes, this sludge will block the automatic air vents and prevent air from escaping the system.

How to Identify the Main Signs of Pump Cavitation

Pump cavitation can occur due to various factors, such as inadequate maintenance practices and insufficient supervision during pump operation. One example is clogged strainers. Normally when the strainers are clogged, pressure drop across the strainers will increase. This increased differential pressure can lead to higher maintenance/operating costs. It is always good practice to check the differential pressure across the strainers before the start of each season.

Recommendation

Pumps play a crucial role in hydronic cooling and heating systems. To ensure optimal performance, it is imperative to have them inspected annually.  Additionally, regular maintenance tasks should be carried out, such as monitoring loop differential pressure and checking for any pump alarms.