MANUAL & AUTOMATIC AIR VENTING VALVES M7900AAV NFPA 13 standard requires the venting of excess air from wet fire sprinkler systems to help prevent internal pipe corrosion. Model 7930 ECA with End Cap and Close Nipple The PURGEnVENTâ„¢ Model 7900AAV is a automatic air venting valve. It includes an isolation valve and a purge valve with an internal 20 mesh strainer screen. The 7900AAV automatic air venting valve has the smallest footprint among similar venting valves and it can be purchased with an end cap and close nipple (Model 7930ECA) for direct installation onto the end of sprinkler system branch lines. AGF also offers a manual air venting valve option, the Model 7910MAV, and an automatic inline version, the Model 7950ILV, for systems with unique installation requirements. For other solutions visit our website www.purgenvent.comhttp://www.purgenvent.com http://www.purgenvent.com