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An atmospheric vacuum breaker is a device used to prevent backflow, or the reversal of the direction of water against the direction that the system is designed to flow. The usual types of backflow for which a preventive method is employed to prevent are those that contaminate potable water with contaminated water, such as the backflow of a source and the system in a home. There are two types of backflow: back-siphonage and back-pressure.

​The ASSE 1022 vented dual check backflow preventer is essential for protecting plumbing systems from the potentially corrosive effects of CO2 gas. Its robust design, featuring a dual check mechanism and high-quality materials, ensures reliable backflow prevention. With regular maintenance and the trusted support of Anderson Brass Company, users can confidently maintain the safety and efficiency of their plumbing systems.

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If the pressure in the water system happens to drop, the poppet valve drops as well, to compensate for the loss of pressure, and so the hood is raised by the action of the poppet valve. Air is sucked into the pipe as well by the loss of pressure, and the vacuum is filled before back-siphonage can occur, because the pressure is neutralized by the air, which, in turn, creates a buffer between the system of potable water and the contaminated water.

The backflow is noted for its simple internal construction. This feature significantly simplifies maintenance tasks, making inspections, cleaning, and functional testing straightforward and efficient. Regular maintenance is crucial to ensure the device operates effectively over time, reducing the risk of contamination or corrosion.

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The ASSE 1022 vented dual check backflow preventer is designed to ensure the safety of the connected plumbing and drinking water. It effectively protects against the corrosive effects of CO2 gas, maintaining the integrity of the system.   The primary check valve acts as the first line of defense against back pressure from the CO2 gas and water mixture, which occurs during each pumping cycle of a carbonator system. Should any fouling or leakage occur, the system is designed to exhaust this mixture safely through a specialized vent fitting. This prevents any backflow into the clean water supply or the plumbing system. The secondary check valve further ensures that under no circumstances does the mixture reach the inlet or interact with any brass or copper components. This dual-layer protection is crucial for preventing corrosion and potential system failures due to chemical reactions.

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Because it makes use of air, an vacuum breaker cannot be placed in an environment where air is contaminated, because this air will then be sucked into the plumbing system, and contaminate the potable water. It must not be installed underground as well, but is seen raised above the ground, because its operation may suck in ground water, which may be contaminated as well, into the system. Above all it is important to employ the right prevention method in the right place at the right time, to prevent contamination and keep ones water lines flowing out smoothly.

Constructed from lead-free brass and stainless steel, the ASSE 1022 backflow preventer prioritizes safety and durability. The choice of these materials ensures that the preventer remains resistant to corrosion, while also safeguarding the water supply from harmful contaminants like lead. The design ensures that the CO2 mixture never comes into contact with the plumbing system, maintaining the highest standards of safety.

In this event, an Atmospheric Vacuum Breaker is used. It resembles a ninety degree elbow with a hood on its top that opens to allow air to enter into the system, filling the vacuum in the event of back-siphonage. The hood is operated by a poppet valve inside the elbow, that is pressed by the pressure in the water system, keeping it held up, and keeping the hood closed.

Back-siphonage occurs when the pressure in a system drops, forcing a higher pressure to fill the difference. Thus, if the pressure in a system of potable water drops, it is possible that non-potable outflow could backflow into the system, ruining the water.