Overfill Prevention Valve - AA Series (3")

FIG 9095AA

The 9095AA valve is installed at the fill port of a storage tank. Designed for use in pressurized fill systems and requires a tight fill connection. The valve installs in a standard 6” NPT male riser connection and can be set to the desired 90% or 95% shut off level by using standard length pipe nipples. 

When installed to the manufacturer’s specifications, the overfill prevention valve can help eliminate hazardous spills. A mechanical test mechanism is available and sold separately.  The test mechanism allows a technician to pull the test line at any time during the filling process to actuate the float and stop the fill.  This allows a technician to verify the valve is working properly. 


*For use on clean liquids only. 

Standard Features

 Top fill, remote fill and dry disconnect connections available

Attach 3 Inch model 419 drop tube with the included drop tube adaptor

Adjustable float (1 1/2”)—for setting the precise shut off height

Integrated bleed hole prevents siphoning through the valve

Immediate and cushioned shutoff  eliminates line shock

Full flow up to within seconds of valve closure

Integral anti-siphon function

Once closed, the integrated bleed hole featured allows less than 2% of the maximum flow to relieve fill line pressure allowing the fill nozzle to be removed without spilling product

Valve operates on simple mechanics with minimal moving parts. Shutoff is activated by basic hydraulic principles with not springs, levers of complicated sequence leading to valve closure

Typical flow rate is 550 GPM at 10 PSI pressure drop

5 PSI minimum flow requirements. The valve will not work in gravity filling applications


Construction Details

  • Quick disconnect adaptor:  Passivated aluminum
  • Remote adaptor: E-coated ductile iron
  • Shaft, linkage, and hardware: Stainless steel
  • Lower pipe nipple: E-coated steel
  • Drop tube adaptor: Passivated aluminum


Code Compliance

ULC-S661-10 listed; NFPA 30, 30A; UFC; IFC; PEI/ RP200; PEI/RP 600; and Florida DEP EQ-851. California EVR models available.





Weight (lbs)



0300 AV




AST OPV; Aluminum body, w/ 3" male quick disconnect x 6" female threads








AST OPV; Aluminum body, w/ 3" female threaded x 6" female threaded connections; CARB EVR approved








AST OPV; Aluminum body, less top connection, CARB EVR approved




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