Specifications
Description
The Watts 411 4 is a 4" lead-free swing check valve with Flanged connections. It permits flow in one direction and closes against reverse flow. It features a cast iron body. Rated to 200 psi and up to 180°F. This model is certified lead-free for potable-water installations.
This 4 inch cast iron swing check valve is designed for commercial and municipal water systems, providing reliable protection against reverse flow. It features a durable cast iron body with flanged connections and a full-port design for minimal pressure drop. The valve includes a lead-free bronze disc and seat for enhanced corrosion resistance and long service life. Compliant with AWWA C508 and NSF 61 standards, it ensures dependable performance in potable water applications.
Features
- Cast iron body
- Lead free bronze disc and seat
- Flanged connections
- Compliant to AWWA C508 and NSF 61
Common Questions
- Can I install it vertically?
- No. The 411 4 is a swing check — the disc closes under its own weight, so it needs a horizontal run with the bonnet up. For a vertical riser, use a spring-loaded silent check instead.
- Will it slam or cause water hammer?
- It can. A swing check closes on the reverse flow itself, so on a pump discharge or any line with fast stops it may slam. Where that matters, choose a spring-loaded silent check or a dual-disc wafer check.
- Does it come with a strainer?
- No. This is an inline check valve only. If the line carries debris, install a strainer upstream — grit on the seat is the usual cause of a check valve weeping by.
- Is it potable rated?
- Yes. The 411 4 is certified lead-free for potable-water piping and is listed to NSF/ANSI 61 for drinking-water contact.
Specifications
- Type: Check
- Size: 4"
- Connection: Flanged
- Body Material: Cast Iron
- Max Pressure (psi): 200
- Application: Domestic Water
- Pack Quantity: 32
- Country of Origin: China
- Warranty: 1 Year Limited
- MPN: 411 4
- Temperature: up to 180°F
- Certifications: NSF-61, AWWA-C508
- Lead-Free: Yes
- Check Mechanism: Swing
- Installation Orientation: Horizontal
- Silent / Non-Slam: No
- Disc / Flapper Material: Lead-Free Bronze
- Integral Strainer Included: No
Product Information
| SKU | UPC | Country of Origin | Warranty | Spec Sheet |
|---|---|---|---|---|
| 0390025 | 098268025637 | China | 1 Year Limited | Download |
Dimensions
| Size Nominal | 4" | End Connection | Flanged |
Details
| Series | 411 | Device Type | Check |
| Lead Free | Yes | Body Material | Cast Iron |
| Application | Domestic Water | Max Pressure PSI | 200.0 psi |
| Max Temp °F | 180.0 °F | Pack Qty | 32 |
| Check Mechanism | Swing | Orientation | Horizontal |
| Disc Material | Lead-Free Bronze | Subtype | Swing Check Valves |
| Type | Check Valves | — | — |
Certifications & Standards
| NSF-61 | AWWA-C508 |
Compare with similar products
| Check Mechanism | Swing
| Swing
| Swing
| Swing
| Swing
| Swing
|
| Orientation | Horizontal
| Horizontal
| Horizontal
| Horizontal
| Horizontal
| Horizontal
|
| Disc Material | Lead-Free Bronze
| Lead-Free Bronze
| Lead-Free Brass
| Lead-Free Brass
| Lead-Free Brass
| Lead-Free Brass
|
| Series | 411
| 411
| LFWCV
| LFWCV
| LFWCV
| LFWCV
|
| Country Of Origin | China
| China
| Taiwan
| Taiwan
| Taiwan
| Taiwan
|
| Warranty | 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
| 1 Year Limited
|
| Spec Sheet | ||||||
| Device Type | Check
| Check
| Check
| Check
| Check
| Check
|
| Size Nominal | 4"
| 6"
| 3/4"
| 1"
| 1/2"
| 3/4"
|
| Lead Free | Yes | Yes | Yes | Yes | Yes | Yes |
| End Connection | Flanged
| Flanged
| NPT
| NPT
| Sweat
| Sweat
|
| Body Material | Cast Iron
| Cast Iron
| Brass
| Brass
| Brass
| Brass
|
| Seat Material | — | — | PTFE
| PTFE
| PTFE
| PTFE
|
| Application | Domestic Water
| Domestic Water
| Steam
| Steam
| Domestic Water
| Domestic Water
|
| Max Pressure PSI | 200.0 psi | 200.0 psi | 200.0 psi | 200.0 psi | 200.0 psi | 200.0 psi |
| Max Temp °F | 180.0 °F | 180.0 °F | — | — | — | — |
| Certifications | NSF-61, AWWA-C508
| NSF-61, AWWA-C508
| — | — | — | — |
| Pack Qty | 32
| 9
| 100
| 80
| 160
| 100
|
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