MERRILL CVR100 Check Valve Box Nos 642367010621 600

( Brand: Merrill ), ( Part Type: Valve Check Box ), ( Body Material: Brass ), ( Wog Rating: 200 Psi ), ( Check Valve Type: Spring ), ( Diameter: 1 In ), ( UPC: 642367010621 )

Review MERRILL Inch Brass Check Valve 600 Series Open Box Nos

The **Merrill 642367010621 Check Valve (600 CVR100 Box No.)** is a high-performance, full-port swing check valve designed for demanding industrial applications where reliable flow control and system protection are critical. Engineered with precision, this valve is part of Merrill s robust line of flow control solutions, offering superior durability and consistent performance in a wide range of fluid handling systems. Constructed from high-quality materials, including a durable body typically cast from ductile iron or bronze (depending on the specific model variant), this check valve is built to withstand the rigors of continuous operation in both residential and commercial plumbing, HVAC systems, and industrial piping networks. Its full-port design ensures minimal pressure drop and optimal flow efficiency, making it an ideal choice for applications where unobstructed fluid passage is essential.

The **600 CVR100** features a **wafer-style or lug-style configuration**, allowing for easy installation between flanges without the need for additional gaskets or spacers, which simplifies maintenance and reduces installation time. The valve operates on a **spring-assisted swing mechanism**, ensuring rapid and reliable closure to prevent backflow, reverse pressure, or potential system damage. The internal components, including the resilient seat and robust disc assembly, are designed to handle a variety of fluids, including water, steam, and light chemicals, while maintaining tight sealing performance even under fluctuating pressure conditions. The valve s **full-lug or wafer-style end connections** (typically sized for 600 series piping) provide flexibility in system integration, accommodating standard flange sizes for seamless compatibility with existing infrastructure.

One of the standout features of this check valve is its **durability and long-term reliability**, thanks to Merrill s emphasis on quality engineering. The valve is equipped with a **self-cleaning disc mechanism**, which minimizes the buildup of debris and ensures consistent operation over extended periods. Additionally, the **spring-loaded closure** provides immediate response to pressure changes, reducing the risk of water hammer and enhancing system stability. The valve s compact yet sturdy design makes it well-suited for tight spaces, while its robust construction ensures resistance to corrosion, scaling, and wear, even in harsh environmental conditions. Whether installed in a residential water supply system, a commercial HVAC setup, or an industrial process pipeline, the **Merrill 642367010621 Check Valve** delivers dependable performance, making it a trusted component for professionals seeking long-lasting and efficient flow control solutions.

### **Pros and Cons of buying a Merrill 642367010621 Check Valve (600 CVR100, Boxed, No Screw)**

1. **Reliable Brand Reputation** Merrill is a well-known manufacturer in the waterworks and industrial valve industry, known for durable and high-performance products. Their check valves are often used in municipal water systems, irrigation, and industrial applications, suggesting a track record of reliability.

2. **Proper Flow Direction** The "CVR" designation indicates it is a **wafer-style check valve with a rubber seat**, which is designed to allow flow in one direction while preventing backflow. This makes it suitable for applications where reverse flow could cause damage (e.g., pumps, irrigation systems, or pressure maintenance).

3. **Standardized Sizing** The **600 CVR100** designation suggests a **6-inch (150mm) nominal size**, which is a common size for medium to large water distribution systems. This makes it compatible with many existing pipelines without requiring custom fittings.

4. **Boxed and Ready for Installation** The valve comes in a box, implying it is new, unopened, and likely in good condition. This reduces the risk of purchasing a used or damaged part.

5. **Potential Cost Savings** Compared to brand-new valves from other manufacturers, Merrill valves may offer competitive pricing, especially if purchased from a reputable distributor or auction.

6. **Compatibility with Common Systems** Wafer-style check valves like this are widely used in **municipal water systems, fire protection, and industrial piping**, making them versatile for various applications.

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1. **Potential for Counterfeit or Used Parts** Since this is a used or surplus item (as suggested by the "nos" in the description), there is a risk that it may be:

- **A counterfeit or rebranded valve** (not genuine Merrill).

- **A previously used valve** that may have internal wear (e.g., rubber seat degradation, corrosion, or mechanical fatigue).

- **Missing critical components** (e.g., gaskets, bolts, or internal springs).

2. **No Warranty or Return Policy** If purchased from a secondary market (e.g., eBay, Facebook Marketplace, or surplus auctions), the seller may not offer a warranty or return option. This means any defects would be your responsibility to resolve.

3. **Lack of Documentation or Testing Records** Unlike new valves, there may be no **manufacturer s test certificates, installation manuals, or proof of maintenance history**, making it harder to verify its condition.

4. **Potential for Hidden Damage** Even if the valve appears intact externally, internal components (such as the **rubber seat, spring, or disc**) could be worn out, leading to **leaks or failure under pressure**.

- The **flange rating (150# or 300#)** matches your system.

- The **connection type (wafer-style)** fits your piping setup (may require adapters).

- The **operating pressure and temperature** limits align with your application.

- **Misrepresented product** (e.g., a different valve model sold as Merrill).

- **Shipping delays or lost items** (common in secondary markets).

- **No customer support** if issues arise post-purchase.

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- You **cannot find a new equivalent** at a reasonable price.

- You **trust the seller s reputation** and have verified the valve s authenticity.

- You **inspect it thoroughly** (or have it professionally inspected) before installation.

- You **accept the risk of no warranty** and are prepared for potential issues.

However, if **reliability and long-term performance** are critical (e.g., in a **municipal water system, fire protection, or high-pressure industrial application**), purchasing a **new, warranted valve** from a **reputable distributor** (such as Grainger, W.W. Grainger, or a local plumbing supplier) may be the **safer and more cost-effective choice in the long run**.

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- **Verify the seller s credibility** (check reviews, ask for photos/videos of the valve in operation if possible).

- Check for **corrosion, cracks, or damage** on the body and flanges.

- Test the **rubber seat and disc** for flexibility and wear.

- Ensure **all bolts, gaskets, and internal components** are present.

- **Consider a professional inspection** if unsure about its condition.

- **Purchase from a trusted surplus dealer** (e.g., a known industrial equipment reseller) rather than an individual seller.

- Look for **new Merrill check valves** from authorized distributors (e.g., Grainger (https://www.grainger.com), W.W. Grainger (https://www.wwgrainger.com), or Valves & Pumps (https://www.valvesandpumps.com)).

- Request **manufacturer s warranty and test certificates** to ensure quality.

- Compare prices with **other reputable brands** (e.g., Flowserve, ITT, or Flow Control) to ensure you re getting a fair deal.

- If the valve is for a **low-pressure, non-critical application**, a used valve may suffice with proper inspection.

- If budget is a concern, consider **new lower-cost alternatives** (e.g., **wafer-style check valves from brands like Flowserve or Flow Control**) that may still meet your needs.

- **Proceed with caution if buying used** only if you are confident in the valve s condition and the seller s integrity.

- **Prioritize a new valve with warranty** if reliability is non-negotiable, especially for **high-stakes applications**.

Details:

Merrill 1 Brass Check Valve 600 Series CVR100 Open Box NOS, See pictures for more complete.

part #: 642367010621 prices

• $12.50-$29.99

specifications valvesplumbing:

• brand: Merrill
• part type: Valve Check Box
• body material: Brass
• wog rating: 200 Psi
• check valve type: Spring
• diameter: 1 In
• upc: 642367010621

offer valvesplumbing:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• started: June 11, 2026

general valvesplumbing:

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

returns valvesplumbing:

• policy: No Returns

shipping valvesplumbing:

• carrier: USPS
• class: Standard
• transit: 2-6 Days
• service: USPS Ground Advantage
• cost: $9.90
• type: Calculated

seller valvesplumbing:

• rating: 100.0%
• city: Amsterdam, Missouri
• # reviews: 4701

payments valvesplumbing:

• wallet: Paypal
• credit card: Diners-club
• other

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