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Specifications
Description
The Watts MAGNUM 20 4 is a 4" double check valve assembly with Grooved connections, approved for low health hazard protection. It features a stainless body. Rated to 175 psi.
This 4 inch Watts Magnum™ 20 double check valve backflow preventer assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backflow due to backpressure and/or backsiphonage conditions. Magnum 20 features integral Eccentric-Seal™ butterfly shutoff valves for a short lay length, and Dual-Action™ checks for high performance at low-and high-flow rates. It may be installed under continuous pressure service to protect against both backpressure and backsiphonage. Maximum working pressure is 175psi (12 bar).
Features
- Integral shutoffs for shorter lay length and lightweight construction
- Dual-action check modules for low-and high-flow performance
- Stainless Steel Body and Shutoffs
- Tamper-resistant test cocks
- Includes: Test Cocks
- Includes: Tamper Switch
Common Questions
- What hazard level is this Double Check approved for?
- It is rated for low health hazard (non-toxic, "pollutant") cross-connections only. Where the substance downstream could be a health hazard, codes require a reduced pressure zone (RPZ) assembly instead. The assembly is listed to ASSE 1015.
- 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.
- Does this assembly have to be tested every year?
- Yes. This is a field-testable assembly with 4 test cocks. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter.
Specifications
- Type: Double Check
- Size: 4"
- Inlet Size: 4"
- Outlet Size: 4"
- Connection: Grooved
- Body Material: Stainless
- Max Pressure (psi): 175
- Application: Domestic Water
- Backflow Protection: Both
- Operation: Continuous
- Country of Origin: United States
- Warranty: 1 Year Limited
- MPN: MAGNUM 20 4
- Lead-Free: No
- Assembly Type: Double Check
- Hazard Protection Level: Low Health Hazard
- ASSE Standard: ASSE 1015
- Field Testable: Yes
- Number of Test Cocks: 4
- Flood Sensor (SentryPlus Alert): No
- Strainer Included: No
- Air Gap Fitting Included: No
Product Information
| SKU | UPC | Country of Origin | Warranty |
|---|---|---|---|
| M-4020 | 737733034391 | United States | 1 Year Limited |
Dimensions
| Size Nominal | 4" | Inlet Size | 4" |
| Outlet Size | 4" | End Connection | Grooved |
Details
| Series | Magnum 20/20G | Device Type | Double Check |
| Body Material | Stainless | Application | Domestic Water |
| Operation | Continuous | Max Pressure PSI | 175.0 psi |
| Backflow Protection | Both | Options | Test Cocks, Tamper Switch |
| Min Temp °F | 33.0 °F | Assembly Type | Double Check |
| Hazard Rating | Low Health Hazard | ASSE Standard | ASSE 1015 |
| Testable | Yes | Test Cocks | 4 |
Compare with similar products
| Backflow Protection | Both
| Both
| Both
| Both
| Both
| Both
|
| Assembly Type | Double Check
| Double Check
| Double Check
| Double Check
| Double Check
| Double Check
|
| Hazard Rating | Low Health Hazard
| Low Health Hazard
| Low Health Hazard
| Low Health Hazard
| Low Health Hazard
| Low Health Hazard
|
| ASSE Standard | ASSE 1015
| ASSE 1015
| ASSE 1015
| ASSE 1015
| ASSE 1015
| ASSE 1015
|
| USC Approved | — | Yes | Yes | Yes | Yes | Yes |
| Fire Listing | — | UL Classified
| UL Classified
| UL Classified
| UL Classified
| UL Classified
|
| Testable | Yes | Yes | Yes | Yes | Yes | Yes |
| Test Cocks | 4
| 4
| 4
| 4
| 4
| 4
|
| Shutoff Valve Type | — | Quarter-Turn Ball
| Quarter-Turn Ball
| Quarter-Turn Ball
| Quarter-Turn Ball
| None
|
| Series | Magnum 20/20G
| LF007
| LF007
| LF007
| LF007
| 007
|
| 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 | Double Check
| Double Check
| Double Check
| Double Check
| Double Check
| Double Check
|
| Size Nominal | 4"
| 2"
| 1/2"
| 1"
| 1-1/2"
| 3/4"
|
| Inlet Size | 4"
| 2"
| 1/2"
| 1"
| 1-1/2"
| 3/4"
|
| Outlet Size | 4"
| 2"
| 1/2"
| 1"
| 1-1/2"
| 3/4"
|
| Lead Free | — | Yes | Yes | Yes | Yes | Yes |
| End Connection | Grooved
| NPT
| NPT
| NPT
| NPT
| NPT
|
| Body Material | Stainless
| Cast Iron
| Cast Iron
| Cast Iron
| Cast Iron
| Bronze
|
| Seat Material | — | Rubber
| Rubber
| Rubber
| Rubber
| Rubber
|
| Application | Domestic Water
| Domestic Water
| Domestic Water
| Domestic Water
| Domestic Water
| Domestic Water
|
| Operation | Continuous
| Continuous
| Continuous
| Continuous
| Continuous
| Continuous
|
| Max Pressure PSI | 175.0 psi | 175.0 psi | 175.0 psi | 175.0 psi | 175.0 psi | 175.0 psi |
| Certifications | — | 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
| ASSE-1015, CSA-B64, UL, USC, IAPMO
|
| Options | Test Cocks, Tamper Switch
| 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 | 33.0 °F |
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