Air Vent & Vacuum Relief Valve


Fresno Valves & Castings Series 3000 Air Vent and Vacuum Relief Valves protect both pressure and gravity systems against pipeline damage by releasing or venting entrapped air during system filling and preventing vacuum locks while the pipeline empties. Available in 2, 3, and 4 inch sizes.

MPN: 559138 SKU: 559138 Category: Tags: ,

Product Description

The Series 3000 Air & Vacuum Relief Valve is designed for use in pressure or gravity water control systems to allow air to escape during pipeline filling and to prevent vacuum locks while the pipeline empties.


  • Simple design ensures economical trouble-free performance.
  • Cast Aluminum body combines lightweight strength and corrosion resistance.
  • Synthetic rubber seal assures positive seal even with low head applications.
  • Large orifice engineered to provide maximum air flow.
  • Ideal for gravity or pressure systems.
  • Improves system efficiency by relieving trapped air from pipelines.

Additional Information


2" Aluminum Air Vent Non-Continuous FIPT, 3" Aluminum Air Vent Non-Continuous FIPT, 4" Aluminum Air Vent Non-Continuous FIPT


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