Zurn Wilkins 34-350 3/4" DCVA Double Check Backflow Preventer

Zurn Wilkins 34-350 3/4" DCVA Double Check Backflow Preventer - Reliable Backflow Protection for Non-Potable Systems.

Overview:

Protect your water system with precision, durability, and efficiency.

Ensure the integrity of your water systems with the Zurn Wilkins 34-350 3/4" DCVA Double Check Backflow Preventer. Designed specifically for non-potable water applications, this device offers robust protection against backpressure and backsiphonage, safeguarding your plumbing infrastructure from potential contaminants. Its compact design and advanced features make it an ideal choice for commercial and industrial settings where water safety is paramount.

The Zurn Wilkins 34-350 DCVA Backflow Preventer delivers peace of mind with advanced backflow protection for non-potable water applications. Engineered with EZSwap™ technology and built from corrosion-resistant materials, this innovative valve minimizes maintenance time, reduces lifecycle costs, and stands strong in tough environments. Whether you're preparing for winter or performing routine service, its user-friendly design saves time, lowers costs, and enhances safety—making it a smart, long-term investment for commercial and industrial water systems.

Important Notice:

This valve is not recommended for potable water applications. For systems requiring lead-free components suitable for drinking water, consider the Zurn Wilkins 350XL Lead-Free DCVA Double Check Valve Backflow Preventers.

Key Features & Benefits:

• EZSwap™ Removable Pressure Vessel: Facilitates effortless line flushing, winterization, and maintenance, enhancing operational efficiency.
• Time-Saving Maintenance: Single-person flushing capability reduces installation and servicing time by up to 15 minutes.
• Winterization Ready: Compatible with Blow-Out Accessory to prevent freeze damage, ensuring system longevity during cold seasons.
• Durable Construction: UV-resistant reinforced nylon pressure vessel and stainless steel components resist corrosion and wear.
• Cost-Effective Lifecycle: Reduced labor and repair kit expenses can yield savings of 75% or more over the product's lifespan.

Product Specifications:

• Size: 3/4"
• Maximum Working Pressure: 175 PSI
• Maximum Temperature: 180°F
• Materials:
  • Main Valve Body: Cast Bronze (ASTM B 584)
  • Housing: Reinforced Nylon
  • Fasteners & Springs: Stainless Steel (300 Series)
  • Elastomers: FDA-Approved Silicone and Buna Nitrile
  • Internals: NSF-Listed Delrin
• End Connections: Threaded ANSI B1.20.1
• Compliance:
  • ASSE® Listed 1015
  • IAPMO® Listed
  • CSA® Certified B64.5
  • AWWA Compliant C510
  • UL® and C-UL® Classified (less shut-off valves)

Installation Tips for Zurn Wilkins 34-350 DCVA:

1. Check Local Codes First
   ✔️ Always verify your local plumbing codes and regulations before installation. These may dictate placement height, drainage requirements, and whether vertical or horizontal installations are permitted.

2. Proper Mounting Height
   📏 Install the backflow preventer at a height between 12” (305mm) and 30” (762mm) above the floor or grade. This allows easy access for testing and maintenance and prevents contamination from standing water.

3. Ensure Adequate Drainage
   🚰 If installing below grade (e.g., in a valve box), make sure there's sufficient drainage to prevent the unit from becoming submerged, which could compromise functionality and durability.

4. Maintain Clearance
   ↔️ Leave enough space on all sides of the unit to allow for easy testing, flushing, and servicing. The EZSwap™ feature is designed for quick maintenance, but only if space is available.

5. Orientation Matters
   🔄 This model can be installed horizontally or vertically (flow up), but be sure to align the arrows on the valve with the direction of water flow.

6. Threaded Connections
   🔩 Use thread sealant (compatible with water systems) on all ANSI B1.20.1 threaded connections. Avoid over-tightening to protect the nylon housing from cracking.

7. Flush the Line First
   💦 Before installing the device, flush the line thoroughly to remove any debris that could damage internal check components.

8. Use the Blow-Out Feature in Cold Climates
   ❄️ Preparing for winter? Connect the Blow-Out Accessory to evacuate water and prevent freeze-related damage.

9. Secure with Proper Support
   🔧 Use pipe supports and struts to prevent stress on valve connections, especially in high-vibration or exposed areas.

10. Perform Post-Installation Testing
    ✅ Once installed, perform a backflow test in accordance with local codes to confirm the unit is functioning correctly.

Why Choose This Backflow Preventer?

• Enhanced Safety: Provides reliable protection against backflow in non-potable water systems, maintaining system integrity.

• Ease of Maintenance: Innovative design allows for quick servicing, reducing downtime and labor costs.

• Durability: Constructed with high-quality materials to withstand harsh environmental conditions and minimize corrosion.

• Versatility: Suitable for various applications, including irrigation, industrial processes, and other non-potable water systems.

❓ Frequently Asked Questions (FAQs)

Q: Is this backflow preventer suitable for potable water systems?
A: No, the Zurn Wilkins 34-350 is designed for non-potable applications. For potable water systems, a lead-free model like the 350XL is recommended.

Q: Can this device be installed vertically?
A: Yes, the design allows for both horizontal and vertical installations, offering flexibility based on system requirements.

Q: What maintenance is required for this backflow preventer?
A: Regular inspections and flushing are advised to ensure optimal performance. The EZSwap™ feature simplifies maintenance procedures.

Q: Does this model comply with industry standards?
A: Yes, it meets or exceeds standards set by ASSE, IAPMO, CSA, AWWA, and is UL and C-UL classified (less shut-off valves).

Technical Downloads:

• Zurn Wilkins 350 Series: Specification Submittal
• Zurn Wilkins 350 Series: Installation & Maintenance Instructions
• Zurn Wilkins 350 Series: Repair Parts (1/2" to 1")
• Zurn Wilkins 350 Series: Repair Parts (1-1/4 to 2")
• Zurn Wilkins 350 Series: Sprinkler Irrigation Blowout Instructions

Media:

Model 350 (3/4" to 1") Repair Video:

Model 350 (1-1/4" to 2") Repair Video:

Zurn Wilkins Backflow Prevention 350 / 375 Fast Focus Video:

Recommissioning Irrigation Systems in the Spring:

Winterizing Irrigation Systems:

Don’t wait until contamination or freeze damage costs you time and money. Upgrade to the Zurn Wilkins 34-350 DCVA today—engineered for efficiency, built for durability, and trusted for backflow protection.