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Internet # 203990029

Model # AV56

Plastic Shallow Well Air Volume Control

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  • Compatible with submersible pumps
  • Designed to control and maintain the air pressure
  • Zinc-plated steel construction enables extended, worry-free use
  • View More Details
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Product Details

About This Product

When the water level is high, the float opens an air inlet valve in the body of the control. The air inlet valve is connected through 48" long polyethylene tubing to a snifter valve on the pump and has no direct connection into the tank. The snifter valve admits air into the pump but prevents the water in the pump from escaping back through it. Air is drawn into the pump through the air inlet valve, connecting tubing and snifter valve and carried out with the water into the tank. This operation continues until the volume of air increases to the proper amount, at which time the float closes the air inlet valve, shutting off the supply of air to the pump. The optimum relationship between the volume of air and water in the tank is thus maintained.


  • Maintains balance of air volume in galvanized water tanks when using shallow well pumps
  • Shallow well control
  • Zinc plated steel construction
  • 48 in poly tubing included
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 203990029

Model # AV56

Additional Resources

Shop All Water Source


Dimensions: H 2.25 in, W 2.25 in, D 11.5 in


Product Depth (in.)

11.5 in

Product Height (in.)

2.25 in

Product Width (in.)

2.25 in


Brand Compatibility

Compatible with all models

Pack Size


Product Weight (lb.)

0.9 lb



Warranty / Certifications

Manufacturer Warranty

1 year

Questions & Answers

Q:Is this all in one, or do I need to install a sniffer valve from the suction of the pump to the 1/4 hose?
by|Mar 24, 2024
0 Answer
Answer This Question
Q:What is the connection size? the nozzle on my tank is inch and a quarter.
by|Feb 3, 2021
1 Answer
Answer This Question

A:  RMC, this item is also 1-1/4 inch, so this should work for your application.

by|Mar 24, 2024
    1 found this answer helpful
    Q:Description says "compatible with submersible pumps,"--but is it compatible with conventional type, above ground pumps?
    by|May 2, 2020
    1 Answer
    Answer This Question

    A:  Yes this will work for your application.

    by|May 2, 2020
      Q:Are these air volume controls adjustable? If they are, do you need to adjust them? How do you adjust them? Thanks.
      by|May 29, 2019
      1 Answer
      Answer This Question

      A:  Thanks for contacting the Everbilt Team. Loosening the lock nut and turning the center adjusting screw counter-clockwise (backing the screw out, or to the left) will increase the amount of air vented from the tank or the rate at which it is vented until rising water level in the tank closes the valve. The result will be less air in the water pressure tank - which you want basically and only if excess air is blowing out of the home faucets. If your well pump is short cycling (meaning you want more air in the pressure tank) you want to turn the screw clockwise (to the right, or "in") This will decrease the amount of air vented from the tank at each pump cycle, increasing the air volume in the pressure tank.

      by|Mar 24, 2024
        2 found this answer helpful
        Showing 1-4 of 8

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