AMES D-4030-CFM Deringer Steel Grooved Backflow Preventer 737733033202 30/30G

( Brand: Ames ), ( Manufacturer Part Number: D-4030-CFM ), ( Supervisory Switches: Pre Wired ), ( Pipe Size: 4 In ), ( Material: 304 Stainless Steel ), ( Backflow Preventer Type: Double Check Assembly ), ( UPC: 737733033202 )

Review AMES Deringer 30/30g Inch Stainless Steel Grooved Backflow Preventer

The **Ames D-4030-CFM Deringer 30/30G Steel Grooved Backflow Preventer** is a robust and high-performance assembly designed to safeguard water systems from contamination and backflow hazards while delivering exceptional durability and reliability. Engineered to meet stringent industry standards, this backflow preventer features a **30/30G configuration**, combining a **30-inch nominal pipe size** with a **30-inch grooved connection**, making it ideal for commercial, industrial, and municipal applications where space efficiency and strong flow capacity are critical. Constructed from **high-quality steel**, this assembly is built to withstand the rigors of heavy-duty use, including high-pressure fluctuations, temperature variations, and corrosive environments, ensuring long-term operational integrity. The **grooved connection system** simplifies installation and maintenance, allowing for quick assembly without the need for welding or threading, which reduces labor time and minimizes potential leaks. Its **Deringer design** incorporates a **double-check valve assembly**, providing an extra layer of protection against backflow by ensuring that water flows in only one direction preventing contamination from entering the potable water supply. The assembly also includes **pressure relief and test ports**, enabling easy monitoring and routine testing to comply with regulatory requirements. With its **compact yet sturdy construction**, this backflow preventer is perfect for applications where space is limited but performance cannot be compromised. Whether installed in a water treatment facility, industrial plant, or large-scale irrigation system, the Ames D-4030-CFM delivers unmatched reliability, ensuring the purity and safety of the water supply while maintaining optimal flow efficiency.

The **Ames D-4030-CFM Deringer 30/30G Steel Grooved Backflow Preventer** is a double-check valve assembly designed to prevent backflow in water systems, ensuring potable water safety. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **High-Quality Construction**

The unit is made of **carbon steel**, which is durable and resistant to corrosion, making it suitable for industrial, commercial, and municipal applications. The grooved connections (using grooved couplings) allow for quick and secure installation without welding, reducing labor time and costs.

2. **Double-Check Valve Design**

As a **30/30G backflow preventer**, it features two independently operating check valves, providing **redundant protection** against backflow. This design meets **NSF/ANSI Standard 61** and **AWWA C510** requirements, ensuring compliance with water safety regulations.

3. **Reliable Performance**

The **Deringer brand** is well-regarded in the water control industry for its **tight sealing** and **low leakage rates**, which is critical for preventing contamination in potable water systems. The grooved back is also less prone to leaks compared to threaded or flanged connections in some applications.

4. **Easy Installation and Maintenance**

Grooved connections simplify field installation, as they do not require welding or threading. This can be advantageous in retrofits or temporary installations. The unit is also designed for **modular maintenance**, allowing individual components (such as check valves or bonnet assemblies) to be serviced without replacing the entire assembly.

5. **Wide Application Range**

Suitable for **residential, commercial, and light industrial** applications where backflow prevention is required, such as in fire protection systems, irrigation, or chemical processing.

6. **Standardized Sizing**

The **4-inch size** is a common nominal pipe size, making it easy to integrate into existing water distribution systems without requiring custom fittings.

7. **Long Service Life**

With proper maintenance, carbon steel backflow preventers can last **decades**, especially in controlled environments where corrosion is minimized (e.g., with internal coatings or cathodic protection).

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### **Cons**

1. **Higher Upfront Cost**

Compared to **plastic or bronze backflow preventers**, steel units are more expensive due to material and manufacturing costs. This may be a barrier for small businesses or residential installations on a tight budget.

2. **Corrosion Risk**

While carbon steel is durable, it is **not immune to corrosion**, especially in **aggressive water conditions** (high chlorine, sulfur, or mineral content). Without proper **internal coatings** or **cathodic protection**, the unit may require more frequent inspections and maintenance in harsh environments.

3. **Space Requirements**

Double-check backflow preventers are **bulkier** than single-check valves or reduced-pressure zone (RPZ) assemblies. This may limit installation options in tight spaces, such as under sinks or in compact mechanical rooms.

4. **Maintenance Dependency**

Like all backflow preventers, the **30/30G requires regular testing and maintenance** (typically **annual testing** per local codes). Failure to maintain it can lead to **leaks, valve failure, or contamination risks**. Some users may overlook maintenance, leading to costly repairs or replacements.

5. **Grooved Connection Limitations**

While grooved connections are convenient, they may not be as **tight-sealing** as flanged or threaded connections in some cases. Over time, grooved couplings can **wear out** or develop leaks, requiring replacement of the coupling rather than just the valve.

6. **Not Ideal for High-Pressure Industrial Use**

While suitable for most municipal and commercial applications, the **4-inch size and standard design** may not be adequate for **high-pressure industrial systems** (e.g., large-scale manufacturing or high-rise buildings), where **larger or specialized backflow preventers** (e.g., RPZ or pressure vacuum breakers) might be required.

7. **Potential for Leakage Over Time**

The **sealing mechanisms** (e.g., rubber or elastomeric components) in check valves can degrade with age, leading to **minor leaks**. While this is common in all backflow preventers, it requires vigilance during inspections.

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### **Conclusion**

The **Ames D-4030-CFM Deringer 30/30G Steel Grooved Backflow Preventer** is a **reliable, durable, and compliant** solution for preventing backflow in water systems where **redundant protection** is necessary. Its **steel construction, grooved connections, and double-check design** make it well-suited for **commercial, municipal, and industrial applications** where water safety is critical.

However, its **higher cost, corrosion susceptibility, and maintenance requirements** mean it may not be the best choice for **budget-conscious residential projects** or **highly corrosive environments** without additional protective measures. Users must also ensure **regular testing and servicing** to maintain its effectiveness.

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### **Recommendation**

- You need a **high-quality, long-lasting** solution for **commercial, municipal, or industrial water systems**.

- Your application requires **double-check protection** (e.g., fire protection systems, chemical processing, or high-risk backflow scenarios).

- You can **commit to regular maintenance** (annual testing, lubrication, and inspections).

- The **grooved connection** aligns with your installation preferences (quick assembly without welding).

- You are working on a **tight budget** and can opt for a **bronze or plastic backflow preventer** (e.g., for residential use).

- Your water system has **extremely corrosive conditions** (consider a **stainless steel or coated steel** model).

- Space is **extremely limited**, and a **compact RPZ assembly** might be more suitable.

- Your application involves **very high pressures or industrial-grade demands**, where a **larger or specialized valve** may be needed.

For **most commercial and municipal applications where backflow prevention is critical**, the **Ames D-4030-CFM is an excellent choice** due to its **reliability, compliance, and durability**. However, **proper installation and maintenance** are essential to ensure its long-term performance. If cost or environmental factors are concerns, explore **coated steel or alternative materials** before finalizing the purchase.

Details:

The valve works perfectly but the entire fire suppression system ended up being replaced in building after install. See Ferguson Part No. AD4030 cfm , Integral shutoffs for shorter lay length and lightweight construction Dual-action check module low-and high-flow performance Rewired supervisory switches Tamper-resistant test cocks This valve is in excellent condition was only place a few months - see photo of tantalizer.

part #: d4030 prices

• $937.00-$2375.00

specifications valvesplumbing:

• brand: Ames
• mpn: D-4030-cfm
• supervisory switches: Pre Wired
• pipe size: 4 In
• material: 304 Stainless Steel
• backflow preventer type: Double Check Assembly
• upc: 737733033202

general valvesplumbing:

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

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• rating: 100.0%
• city: Vancouver, Washington
• # reviews: 223

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• started: March 22, 2026
• quantity: 1
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