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The broken set screw results in a significant problem when the hose vacuum breaker needs to be replaced.  This requires cutting the vacuum breaker body about ½ way through in two or more areas. Then, the body section with the broken screw must be physically broken off. This allows the breaker to be unthreaded from the faucet bibb.

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Vacuum breakers must be installed at least six inches above the ground surface and must follow the installation parameters in the 2021 Uniform Plumbing Code Table 603.2.

When a vacuum occurs, the spring pulls the valve closed before any reverse flow can take place. The rubber disc seals against the valve seat.

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Breaking the set screw head off is mandated by plumbing codes in many areas. You must make sure to comply with all applicable plumbing and building codes for your area.

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The best way to avoid the issues with regards to the hose bibb vacuum breaker replacement is to install a wall hydrant that has the vacuum breaker feature built in the body of the faucet rather than being attached to the hose bibb.

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Vacuum breakers are supplied with a “break-away” set screw. The head of the screw will break off when tightening torque is applied. Breaking off the screw head prevents the removal of the vacuum breaker once it is installed. Once the vacuum breaker is installed, no further adjustments are required.

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Southern Water Technologies, Inc. has been helping customers with their water and wastewater treatment needs for over 20 years, and we have found that one thing is certain; your word is your sacred bond. So here’s our word: we will do everything in our power to educate and enlighten our customers. We will empower them with the tools to make wise decisions, and we’ll be there for them before, during and long after the deal is done. After all, it’s our name on the door, and you have our word on it!

A vacuum breaker prevents back flow to the water supply by venting water and discharging it onto the ground (to the atmosphere). When conditions for back flow exist, a spring-loaded check valve is opened by the back flow and the water will be discharged to the atmosphere.

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If your faucet has a garden hose connection and does not have a built-in vacuum breaker, then a vacuum breaker should be installed on each faucet or hose bibb that is connected to the potable water supply. This is an integral part of the faucet and will help to prevent backflow into the water supply.

We strive to represent only the highest quality manufacturers in our industry, with both the qualified personnel and the financial resources to deliver a quality product, on time, and in budget.

If a break off screw is NOT mandated by code in your area, some installers choose to replace the break-away set screw with a standard #10-32 screw to prevent it from being removed accidentally when the garden hose is removed.

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When the system pressure is sufficient to open the check valve, flow is directed through the vacuum breaker into the garden hose. When the supply pressure is interrupted or when the pressure in the hose becomes greater than the supply pressure, outflow stops and the spring-loaded check valve closes, simultaneously opening a vent to the atmosphere. In this mode of operation, any water that flows backward through the vacuum breaker is vented onto the ground.

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