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3/4" Hose Bibb Vacuum Breaker - Piston Activated, Self-Draining


Regular price $12.95

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Piston Activated Frost Proof Self-Draining Hose Bibb Vacuum Breaker | Lead-Free, Solid Brass

Designed for use on yard hydrants, and hose bibbs to prevent back siphoning of contamination in the potable water supply. This self-draining Lead Free hose bibb vacuum breaker will automatically drain when the hose is disconnected from valve outlet. This is accomplished when the hose is disconnected, by causing a spring loaded plunger to spring forward off the seat, thereby allowing drainage of the valve and yard hydrant outlet. Air is now allowed in the hydrant to allow drainage and freeze protection. Draining protects the valve from freezing and rupturing in cold weather. Comes complete with a breaking set screw. Once tightened set screw will break off to prevent tampering and removal. Please note that once secured the hose bibb vacuum breaker will not be able to be removed without force by any individual. 

Vacuum Breaker  General Information

  • Valves: 1 check valve
  • Connection Type: FIP 
  • Inlet: 3/4" Female Garden Hose Thread
  • Outlet: 3/4" Male Garden Hose Thread
  • Max Pressure: 125 psi
  • Max Temp: 180 degrees F
  • Material: Lead Free Solid Brass
  • Comes equipped with a Tamper-Proof thread locking device

Vacuum Breaker Standards

  • ASSE 1011 Certified
  • CSA B64.2 Approved
  • UPC Approved

Vacuum Breaker Features

  • Made from heavy duty lead free brass
  • Lead free certified
  • Self-draining when detached from valve outlet
  • 1 year warranty

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Ask a Question
  • Is this vacuum breaker certified for constant pressure?

    No, this vacuum breaker is not certified for constant pressure, however they are widely used for constant pressure. Most boards of health and public safety accept them for constant pressure situations as they offer excellent protection for back flow protection and some protection is better than none at all.

  • Is this vacuum breaker frost proof?

    This vacuum breaker is NOT frost proof, however you can find a frost proof vacuum breaker here.

  • I need to replace the vacuum breaker, however the locking screw head has been snapped off. How do I remove the locking screw to replace the vacuum breaker?

    In order to remove the locking screw on the vacuum breaker, you will need to drill a small hole into the set screw and use a screwdriver or drill and turn counterclockwise in an attempt to remove the locking screw. In the future to avoid this problem, we recommend removable locking screws which can be found here.

  • What is the size of the locking break off screw?

    The locking break off screw on the vacuum breaker are 10/32.

  • Is it possible to remove the locking screw from the back flow prevention device before installation?

    Yes, you can simply remove the locking screw from the vacuum breaker before installation and it will not effect the functionality of the device. Please note, however that if the locking screw is removed, the vacuum breaker can then be removed by any user. If you are using this in a commercial setting it may be best to keep a locking device on the vacuum breaker so you can ensure the device is not removed from the water outlet. If you do not wish to use a breaking lock screw, you can install a removable locking screw that is removed by an allen wrench. You can find the removable locking screws here.

  • There is a constant drip coming from my vacuum breaker, should I replace it?

    When the water is turned off at the water source, any water that would have been siphoned into the water supply will leak out. If water continues to leak when the water source remains closed and off, check the hose bibb, spigot, faucet, or yard hydrant to ensure the handles have not come lose and may be causing a slow drip. If water continues to leak, it is possible the faucet, or hose bibb may need to be replaced.

  • When I turn the water off, no water is released, does this mean my vacuum breaker is broken or needs to be replaced?

    Not necessarily. In order for water to be released from a vacuum breaker a drop in pressure must occur. Simply shutting the source of water off will not always cause a drop in pressure, so it is not uncommon for no water to leak.

  • How does my vacuum breaker fail?

    Vacuum breakers may require some routine maintenance such as cleaning. Vaccum breakers may sometimes become lodged with contaminants frequently found in hard water sources that bay cause the vacuum breaker to become stuck or clogged. You can remove the vacuum breaker and gently clean it with warm soapy water in an effort to remove or loosen dirt particles and contaminants.

  • How do I know if my vacuum breaker is broken or needs to be replaced?

    You can test the function of your vacuum breaker by hooking a hose up to the hose bibb vaccum breaker and installing a nozzle or valve that can be closed to the end of the house. When installed, close the valve or nozzzle offf at the end of the hose and open the hose bibb, then quickly close the hose bibb while the hose is pressurized. Within a few seconds you should see a small spray of water released from the hose bibb vacuum breaker as the pressure is released from the hose. If no water leaks or sprays from the vacuum breaker, or if the vacuum breaker continuously leaks, you need to clean or replace the hose bibb vaccum breaker.

  • How does a vacuum breaker stop back flow from happening?

    A vacuum breaker works with the water flow. Water pressure flowing through the device will push the valve open and when the water is turned off and the water pressure drops the valve closes. When the vacuum breaker closes, the valve keeps the water from going back into the spigot and rather leaks through the vacuum breaker.

  • What events cause back flow to happen?

    Back flow can happen any time a sudden drop in pressure occurs. This may happen when the fire hydrants in your area are opened, when a local water main breaks or if there is a malfunction in a fire safety sprinkler system.

  • Why do I need a vacuum breaker?

    If you use a hose and leave the hose bibb or faucet open while doing things such as yard work or washing your car, it is highly recommended to use a vacuum breaker. While the hose lays on the ground and the water source remains open, if a drop in pressure occurs, anything that is in or around the hose opening, such as dead insects, pesticides, and chemicals can be sihponed into your water source. Even if it is not required by your local authorities, it is a safe and inexpensive way to protect your family and their potable water source. 

  • How does back flow occur?

    Normal water pressure keeps water flowing out, however when a significant drop in pressure occurs a suction can occur pulling water backwards causing bacteria and contaminants to enter your water source.

  • What is back flow?

    Back flow is when water flows in the reverse direction than intended.

  • Do I need a vacuum breaker?

    Vacuum breakers are required in most states, however you would need to confirm your direct requirements with your local authorities to confirm your local plumbing codes. Vaccum breakers are typically required for new homes. It is important to asess your risk. If you regularly wash your car at home using chemicals and a spray nozzle or you use pestacides in your lawn, it may be a safe bet to install a vacuum breaker to prevent any of these chemicals from getting into your potable water source if a hose is accidentally left in the vacinity of any contaminants.

  • Do I have a vacuum breaker installed?

    You may have a vaccum breaker already installed. If you look at your water source and see a threaded device attached to the output, you likely have a vacuum breaker attached.

  • What is a vacuum breaker?

    A vacuum breaker is a threaded device attached to a faucet, hose bibb, or a yard hydrant that prevents water from flowing in the reverse direction and entering your water source.

  • What is the the amount of lead in this vacuum breaker?

    This product is certified 'lead-free' which means it has less than the 0.25% lead content allowed.

  • Does this product reduce the water flow from the house?

    Thank you for reaching out to us! Our Hose Bibb Vacuum Breakers do not restrict or reduce the water flow from the house.