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Theory, Application, and Sizing of Air Valves in Water and Wastewater System Pipelines

Theory, Application, and Sizing of Air Valves

One of the most misunderstood aspects of the water and wastewater industry is the presence of air in a pipeline and its impact on operations. Many operational problems, especially at the time of initial start-up, including damaged equipment, as well as faulty instrumentation readings, are blamed on inadequate thrust blocking, improper pipeline bedding, etc. But in reality, many of these problems are not caused by improper installation of the line, but by failure to de-aerate the line. Properly de-aerating the pipeline with the use of automatic air valves will safeguard it from air-related problems.


  • Introduction
  • Three Basic Types of Air Valves
  • Air Release Valves
  • Air/Vacuum Valves
  • Combination Air Valves
  • Air Valve Locations Along a Pipeline
  • Air/Vacuum Valve Sizing
  • Air Release Valve Sizing
  • Summary
  • References

Download the "Theory, Application, and Sizing of Air Valves" Technical White Paper Here

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