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Specifications
Description
The Watts B911T-M3 is a 1/2" backflow preventer with NPT connections. It features a bronze body and a ptfe seat. Rated to 100 psi and up to 212°F.
This 1/2 inch bronze combination fill valve and backflow preventer is for use in commercial and residential hydronic heating systems to provide make-up water to the boiler, and prevent backflow when supply pressure falls below system pressure. It consists of a bronze backflow preventer, model 9D and a bronze feed water pressure regulator, model 1156F, in one pre-assembled unit. The high capacity fill valve provides quick system filling and purging. It is designed for use in the boiler feed lines of hydronic heating systems and has 1/2 inch union NPT inlet x NPT threaded outlet connections. The maximum pressure is 100 psi (6.9 bar).
Features
- Bronze body for durability
- Threaded connections
- Strainer screen
- Horizontal or vertical installation
- Includes: Strainer
Common Questions
- 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.
- How does this have to be installed?
- It is approved for either horizontal or vertical installation, with the flow arrow on the body pointing in the direction of flow.
Specifications
- Type: Pressure Regulator
- Size: 1/2"
- Inlet Size: 1/2"
- Outlet Size: 1/2"
- Connection: NPT
- Body Material: Bronze
- Seat / Seal Material: PTFE
- Max Pressure (psi): 100
- Pack Quantity: 6
- Country of Origin: United States
- Warranty: 1 Year Limited
- MPN: B911T-M3
- Temperature: up to 212°F
- Lead-Free: No
- Shutoff Valves: None
- Approved Orientation: Horizontal & Vertical
- Flood Sensor (SentryPlus Alert): No
- Strainer Included: Yes
- Air Gap Fitting Included: No
Product Information
| SKU | UPC | Country of Origin | Warranty | Spec Sheet |
|---|---|---|---|---|
| 0386463 | 098268918533 | United States | 1 Year Limited | Download |
Dimensions
| Size Nominal | 1/2" | Inlet Size | 1/2" |
| Outlet Size | 1/2" | End Connection | NPT |
Details
| Series | 911 | Device Type | Pressure Regulator |
| Body Material | Bronze | Seat Material | PTFE |
| Max Pressure PSI | 100.0 psi | Max Temp °F | 212.0 °F |
| Pack Qty | 6 | Options | Strainer |
| Shutoff Valve Type | None | Orientation | Horizontal & Vertical |
| Strainer Included | Yes | — | — |
Compare with similar products
| Backflow Protection | — | Both
| Both
| Both
| Both
| Both
|
| Assembly Type | — | RPZ
| Double Check
| Double Check
| Double Check
| Double Check
|
| Hazard Rating | — | High Health Hazard
| Low Health Hazard
| Low Health Hazard
| Low Health Hazard
| Low Health Hazard
|
| ASSE Standard | — | ASSE 1013
| ASSE 1015
| ASSE 1015
| ASSE 1015
| ASSE 1015
|
| USC Approved | — | Yes | Yes | Yes | Yes | Yes |
| Fire Listing | — | UL Classified, FM Approved
| UL Classified
| UL Classified
| UL Classified
| UL Classified
|
| Testable | — | Yes | Yes | Yes | Yes | Yes |
| Test Cocks | — | 4
| 4
| 4
| 4
| 4
|
| Shutoff Valve Type | None
| Quarter-Turn Ball
| Quarter-Turn Ball
| Quarter-Turn Ball
| Quarter-Turn Ball
| Quarter-Turn Ball
|
| Series | 911
| LF009
| LF007
| LF007
| LF007
| LF007
|
| Country Of Origin | United States
| United States
| United States
| United States
| United States
| United States
|
| Warranty | 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
|
| Spec Sheet | ||||||
| Install Sheet | — | |||||
| Device Type | Pressure Regulator
| RPZ
| Double Check
| Double Check
| Double Check
| Double Check
|
| Size Nominal | 1/2"
| 3/4"
| 2"
| 1/2"
| 1"
| 1-1/2"
|
| Inlet Size | 1/2"
| 3/4"
| 2"
| 1/2"
| 1"
| 1-1/2"
|
| Outlet Size | 1/2"
| 3/4"
| 2"
| 1/2"
| 1"
| 1-1/2"
|
| Lead Free | — | Yes | Yes | Yes | Yes | Yes |
| End Connection | NPT
| NPT
| NPT
| NPT
| NPT
| NPT
|
| Body Material | Bronze
| Bronze
| Cast Iron
| Cast Iron
| Cast Iron
| Cast Iron
|
| Seat Material | PTFE
| Silicone
| Rubber
| Rubber
| Rubber
| Rubber
|
| Application | — | Domestic Water
| Domestic Water
| Domestic Water
| Domestic Water
| Domestic Water
|
| Operation | — | Continuous
| Continuous
| Continuous
| Continuous
| Continuous
|
| Max Pressure PSI | 100.0 psi | 175.0 psi | 175.0 psi | 175.0 psi | 175.0 psi | 175.0 psi |
| Certifications | — | ASSE-1013, CSA-B64, UL, FM, USC, IAPMO
| ASSE-1015, CSA-B64, UL, USC, IAPMO
| ASSE-1015, CSA-B64, UL, USC, IAPMO
| ASSE-1015, CSA-B64, UL, USC, IAPMO
| ASSE-1015, CSA-B64, UL, USC, IAPMO
|
| Options | Strainer
| Test Cocks
| Test Cocks
| Test Cocks
| Test Cocks
| Test Cocks
|
| Min Temp °F | — | 33.0 °F | 33.0 °F | 33.0 °F | 33.0 °F | 33.0 °F |
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