PURGEnVENT 7900AAV Manual

Automatic Air Venting Valve
The PURGE VENT Model 7900AAV Automatic Air Venting Valve is designed to exceed NFPA 13 code that requires a
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single air vent be provided on each wet pipe sprinkler system utilizing metallic pipe.
To rapidly remove air from the system attach a hose to the purge valve's hose connection and open the valve while the
system is being filled. Once the system is in operation the automatic vent will release any excess air. The purge valve is
also convenient for cleaning the strainer.
AGF recommends installing the M7900AAV at high points near the end of system branch lines, whenever possible.
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NFPA 13 (2016)
7.1.5 Air Venting
A single air vent with a connection conforming to 8.16.6 shall be
provided on each wet pipe system utilizing metallic pipe.
8.16.6* Air Venting
The vent required by 7.1.5 shall be located near a high point in
the system to allow air to be removed from that portion of the
system by one of the following methods:
• Manual valve, minimum 1/2" (15mm) size
• Automatic air vent
• Other approved means
7610-2281 : 0500
Reliability, Versatility, Code Compatibility
Model 7900AAV
W W W. PUR GE NVE NT.C O M
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1. Patented,
M7900V Air Release Valve.
2. Forged brass body with 1" NPT isolation valve.
3. Stainless Steel 20 mesh strainer.
4. Adjustable purge valve with hose connection,
thread cap, and lanyard.
5. Unique conical shape maximizes clearance to
protect valve from contamination.
6. Recessed venting valve prevents damage to
vent mechanism and float.
7. Single float on rigid shaft only allows vertical
movement.
8. Bubble Breaker aids in the passage of air to the
vent and acts as a secondary filter.
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FM Approved, UL Listed
SS-7900 · 1/19