The Watts 288A-B is a 1/2" anti-siphon (atmospheric) vacuum breaker with NPT connections, approved for high health hazard protection.
Common Questions
- What hazard level is this AVB approved for?
- It is rated for high health hazard (toxic) cross-connections, but only against backsiphonage. The assembly is listed to ASSE 1001.
- Can this be installed on potable water?
- No. This model is not certified lead-free, so it may not be installed in potable water systems in states enforcing the NSF/ANSI 372 weighted-average lead rule. Use it on non-potable service — fire lines, irrigation or industrial water — or order the LF (lead-free) version of this model for drinking-water use.
- Can this device be field tested?
- No. It has no test cocks and is not a testable assembly, so it cannot be certified by a backflow tester. Where a jurisdiction requires an annually tested device, specify a testable assembly (double check, RPZ, or PVB) instead.
- Will this protect against backpressure?
- No. An anti-siphon (atmospheric) vacuum breaker protects against backsiphonage only. It will not stop backflow caused by backpressure — a downstream pump, elevated piping or a boiler — which requires a double check or RPZ assembly. It also may not be used under continuous pressure: the supply downstream of it must not stay pressurized for more than 12 hours in any 24-hour period.
- How does this have to be installed?
- It must be installed vertically (upright), above the highest downstream outlet, per the installation instructions and its ASSE listing.
Specifications
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Type: AVB
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Size: 1/2"
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Inlet Size: 1/2"
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Outlet Size: 1/2"
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Connection: NPT
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Backflow Protection: Backsiphonage
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Operation: Non-Continuous
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Pack Quantity: 50
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Country of Origin: Mexico
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Warranty: 1 Year Limited
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MPN: 288A-B
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Lead-Free: No
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Assembly Type: AVB
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Hazard Protection Level: High Health Hazard
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ASSE Standard: ASSE 1001
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Field Testable: No
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Number of Test Cocks: 0
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Shutoff Valves: None
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Approved Orientation: Vertical
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Flood Sensor (SentryPlus Alert): No
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Strainer Included: No
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Air Gap Fitting Included: No