The Watts 188A 1 1/2 is a 1-1/2" anti-siphon (atmospheric) vacuum breaker with FNPT connections, approved for high health hazard protection. It features a brass body and a silicone seat. Rated to 125 psi and 33°F to 180°F.
This 1 1/2 inch anti-siphon vacuum breaker backflow preventer helps prevent the backsiphonage of contaminated water from entering into the potable water supply. It is ideal for low flow non-continuous pressure installations such as residential irrigation systems or laboratory equipment. This vacuum breaker consists of a brass body with bronze internal trim, chemical resistant seat disc and an atmospheric vent to prevent spilling. The durable silicone disc is suitable for temperatures up to 180 degrees F (82 degrees C) and ensures tight seating with the lightest of seating contacts. The maximum working pressure is 125 psi (8.6 bar).
Features
- Durable brass body
- Ideal for irrigation systems
- Female NPT inlet and outlet
- Easy to install
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: 1-1/2"
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Inlet Size: 1-1/2"
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Outlet Size: 1-1/2"
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Connection: FNPT
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Body Material: Brass
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Seat / Seal Material: Silicone
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Max Pressure (psi): 125
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Application: Domestic Water
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Backflow Protection: Backsiphonage
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Operation: Non-Continuous
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Pack Quantity: 6
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: 188A 1 1/2
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Temperature: 33°F to 180°F
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Certifications: ASSE-1001, ANSI-A112.1.1
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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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USC FCCCHR Approved: No
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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
