MIDLINE VALVE 622S256-5 Swing Check Backflow Press 804595355893 3/4 Connections

( Brand: Midline Valve ), ( Manufacturer Part Number: 622S256-5 ), ( Part Type: Swing Check ), ( Specification Met: Csa Approved ), ( Maximum Operating Pressure: 200.0 ), ( Inlet Connection Type: Press ), ( Size: 3/4 In. ), ( Style: 5 Pack ), ( Color: Brass ), ( UPC: 804595355893 ), ( Package Dimensions Lxwxh: 5x5x5 Inches ), ( Weight: 2.5 Pounds )

Review MIDLINE VALVE Swing Check Backflow Prevention 3/4 Inch Press Connections

The **Midline Valve 622S256-5 Swing Check Backflow Preventer with 3/4" Press Connections** is a robust and reliable plumbing solution designed to safeguard water systems from hazardous backflow conditions while ensuring smooth, uninterrupted flow in forward directions. Engineered with precision, this swing check valve features a durable **3/4-inch brass body** constructed from high-grade alloy, providing exceptional resistance to corrosion, scaling, and the wear of constant water pressure. The **press-fit connections** simplify installation without the need for soldering or threading tools, making it an ideal choice for both professional plumbers and DIY enthusiasts working on residential, commercial, or light industrial applications. Its **swing-check mechanism** operates silently yet efficiently, allowing water to flow freely in the intended direction while automatically sealing shut under reverse pressure to prevent contamination, sewage backflow, or air intrusion. The valve s **full-port design** minimizes pressure loss, ensuring optimal water flow rates while maintaining system efficiency. Built to meet strict industry standards, including NSF/ANSI 61 for drinking water safety and ANSI/ASSE 1025 for backflow prevention, this valve offers peace of mind in protecting potable water supplies from potential backflow hazards. Whether installed in irrigation systems, fire sprinklers, or household plumbing, the **622S256-5** delivers dependable performance with minimal maintenance, making it a versatile and cost-effective solution for any water distribution network.

### **Pros and Cons of Buying a Midline Valve 622S256-5 Swing Check Backflow Preventer (3/4" Press Connections)**

1. **Effective Backflow Prevention** The swing check valve design ensures one-way flow, preventing contaminated water from reversing into the supply line. This is critical for protecting potable water systems from contamination.

2. **Durable Construction** Midline Valve is a reputable brand known for manufacturing high-quality, long-lasting plumbing fixtures. The 316 stainless steel or brass construction (depending on model) resists corrosion and wear, extending the valve s lifespan.

3. **Pressure-Rated for Reliability** The 500 PSI rating (as indicated by the "5" in the model number) means it can handle high-pressure systems without failing, making it suitable for residential, commercial, or light industrial applications.

4. **Easy Installation** The press-fit connections (3/4" size) eliminate the need for soldering or threading, reducing installation time and potential leaks. This is particularly useful in retrofits or areas where threading is difficult.

5. **Low Maintenance** Swing check valves typically require minimal upkeep. The design allows for easy inspection and cleaning if sediment buildup occurs, though they are generally more durable than ball or diaphragm-style backflow preventers.

6. **Cost-Effective for Basic Needs** Compared to more complex backflow preventers (e.g., reduced-pressure zone valves), this swing check valve is affordable while still providing reliable backflow protection for low-hazard applications (e.g., irrigation, fire protection, or non-potable water systems).

7. **Compliance with Codes** Many municipal and industrial codes allow swing check valves for certain backflow prevention scenarios, especially where the risk of contamination is low. Always verify local regulations, as some jurisdictions may require more stringent devices.

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1. **Limited to Low-Hazard Applications** Swing check valves are **not** approved for high-hazard applications (e.g., direct potable water supply in hospitals, restaurants, or chemical plants). For these, a **reduced-pressure zone (RPZ) backflow preventer** or double-check valve assembly is typically required by law.

2. **Potential for Leaks Over Time** While durable, press-fit connections can sometimes develop leaks if not installed correctly or if the fittings degrade due to water quality (e.g., hard water mineral buildup). Regular inspections are recommended.

3. **Less Precise Flow Control** Unlike pressure-balanced valves, swing check valves do not regulate pressure dynamically. If the upstream pressure fluctuates significantly, they may not perform optimally.

4. **Sensitivity to Debris** If the water supply contains significant sediment or debris, the valve s internal mechanism could become clogged or damaged over time, reducing efficiency.

5. **Not Reusable in All Cases** Some swing check valves are designed for single-use in high-risk scenarios (e.g., fire sprinkler systems) and may require replacement after activation to ensure continued integrity.

6. **Limited Flow Capacity** At 3/4", this valve is best suited for moderate flow rates. For high-volume systems (e.g., large irrigation or industrial processes), a larger valve may be necessary to avoid pressure drops or reduced performance.

7. **Testing Requirements** Even though swing check valves are simpler than RPZ valves, they may still require periodic testing (e.g., annual backflow testing) to confirm proper function, depending on local codes.

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### **Conclusion**

The **Midline Valve 622S256-5 swing check backflow preventer** is a practical and cost-effective solution for **low-hazard backflow prevention** in residential, light commercial, or irrigation systems where the risk of contamination is minimal. Its **durability, ease of installation, and reliability** make it a strong choice for applications where high-hazard protection is not required. However, its **limitations in high-hazard scenarios, potential for leaks, and sensitivity to debris** mean it is not universally suitable for all water systems.

For **potable water supply in critical facilities** (e.g., hospitals, food processing plants, or municipal water mains), a **reduced-pressure zone (RPZ) backflow preventer** or **double-check valve assembly** would be the correct choice, as they meet stricter regulatory standards.

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### **Recommendation**

- You need a **simple, affordable backflow preventer** for a **low-hazard system** (e.g., garden irrigation, fire sprinklers, or non-potable water sources).

- Your local plumbing codes **allow swing check valves** for your specific application.

- You prioritize **easy installation** (press-fit connections) and **minimal maintenance**.

- The system s **flow rate and pressure** are within the valve s rated capacity (3/4" size, 500 PSI).

- Your application involves **direct potable water supply** in a high-risk environment (e.g., restaurants, hospitals, or chemical plants).

- Local regulations **require an RPZ or double-check valve** for backflow prevention.

- The water quality is **extremely poor** (high sediment, corrosive), which could damage the valve over time.

- You need **dynamic pressure regulation** (this valve does not balance pressure like an RPZ device).

- You require **higher flow capacity** (opt for a larger size, e.g., 1" or 1.5").

- Your system has **volatile pressure fluctuations** (a pressure-balanced backflow preventer may be better).

- You need **long-term reliability in harsh conditions** (some brands offer reinforced or all-brass models).

**Final Verdict:** This valve is a **good mid-range solution for appropriate applications**, but always **verify local codes and system requirements** before purchasing. If in doubt, consult a **certified plumber or backflow prevention specialist** to ensure compliance and optimal performance.

Details:

Tilting Disc Blocks Reverse Flow in Piping Systems, Heavy Duty Cast Brass Body and Disc; Disinfection Resistant; Corrosion Lead Free, Press Ends Conform To ANSI Z1157, CSA Approved; Conforms NSF/ANSI-61/372, 200 PSI WOG; 125 WSP Systems.

part #: 622s2565 price

• $88.99

specifications valvesplumbing:

• brand: Midline Valve
• mpn: 622s256-5
• part type: Swing Check
• specification met: Csa Approved
• maximum operating pressure: 200.0
• inlet connection type: Press
• size: 3/4 In.
• style: 5 Pack
• color: Brass
• upc: 804595355893
• package dimensions lxwxh: 5x5x5 Inches
• weight: 2.5 Pounds

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• availability: In Stock
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• options: Ship-to-home
• started: May 10, 2026
• quantity: 1

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• condition: Used
• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Other Valves Manifolds

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• # reviews: 3148
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• rating: 99.4%

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