The Watts 288A-MB 3/4 is a 3/4" anti-siphon (atmospheric) vacuum breaker with NPT connections, approved for high health hazard protection. It features a brass body and a silicone seat.
This 3/4 inch anti-siphon vacuum breaker can be used on hot or cold water health hazard installations, such as laboratory equipment. It is designed to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It has a brass body, full size orifice, chemical resistant silicone seat disc and an atmospheric vent to prevent spilling. The connections are British Standard Pipe (BSP) thread.
Features
- Brass body material
- Use in hot or cold water health hazard installations
- Full size orifice
- Protection type backsiphonage
- British Standard Pipe (BSP) thread end connections
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
-
Type: AVB
-
Size: 3/4"
-
Inlet Size: 3/4"
-
Outlet Size: 3/4"
-
Connection: NPT
-
Body Material: Brass
-
Seat / Seal Material: Silicone
-
Application: Domestic Water
-
Backflow Protection: Backsiphonage
-
Operation: Non-Continuous
-
Pack Quantity: 24
-
Country of Origin: Mexico
-
Warranty: 1 Year Limited
-
MPN: 288A-MB 3/4
-
Lead-Free: No
-
Assembly Type: AVB
-
Hazard Protection Level: High Health Hazard
-
ASSE Standard: ASSE 1001
-
Field Testable: No
-
Number of Test Cocks: 0
-
Shutoff Valves: None
-
Approved Orientation: Vertical
-
Flood Sensor (SentryPlus Alert): No
-
Strainer Included: No
-
Air Gap Fitting Included: No
