Fisher 3990 Atmospheric Pressure Vacuum Breaker Assembly with 1/2" Male Connections
- Made of brass
- Atmospheric design
- 1/2" male connections
- Temperature limits of 40-140 degrees Fahrenheit
- 200 PSI maximum
- Connections on 6" centers
Fisher offers four general types of backflow prevention. We use an air gap, we use an atmospheric vacuum breaker, a dual check valve backflow preventer, and an anti-spill pressure style vacuum breaker. Each has its own unique application. Air gap is the distance between where the water comes out of the fixture and the flood rim of the sink. You need to maintain a minimum of 2" air gap. The dual inline check valve backflow preventer is used whenever you have a flexible air gap, such as on a pre-rinse where the outlet of the device could well be below the flood rim of the sink. Atmospheric vacuum breakers commonly found on kettle fillers and service faucets are designed to prevent back siphonage. The caution is that you are not allowed to have any shut-off valves downstream of the atmospheric vacuum breaker. Anti-spill pressure style vacuum breakers are commonly found on hose reel units. They protect against back siphonage, back pressure, and it's important to note that you can have valving on the inlet side of this and the outlet side of it. And they are not to be installed above ceiling tiles in the wall, it must be accessible for inspection. Backflow prevention can be quite complex, however, in the Fisher catalog we offer many kits and components to make the process quite simple. Be sure and check your local codes. Thanks for watching.
With four general types of backflow prevention, you're sure to find the best one to suit your needs with Fisher. Watch this video to learn all about the various fixtures you can use to help prevent backflow in your plumbing system!
Fisher 3990 Details
Prevent backflow and keep your plumbing systems up to code with this Fisher 3990 atmospheric pressure vacuum breaker assembly with 1/2" male connections. This backflow device is made of brass and features an atmospheric design which is commonly used on kettle or pot fillers and service faucets. This type of backflow preventer is made to keep water from being siphoned back into the clean water supply. It is made to operate within specific limits, including a temperature range of 40-140 degrees Fahrenheit and a maximum pressure of 200 PSI. This vacuum breaker has 1/2" male connections.
Connection Centers: 6"
Height: 9 5/8"
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