Zurn Wilkins 2-350 2" DCVA Double Check Backflow Preventer

Product Overview

The Zurn Wilkins 2-350 Double Check Valve Assembly (DCVA) is a durable backflow preventer designed to protect water supplies from low-hazard contamination in non-potable applications. Built with reinforced nylon and stainless-steel hardware, this assembly ensures long service life and reliable protection against both backsiphonage and backpressure. Its EZSwap™ removable pressure vessel design makes maintenance, winterization, and flushing quick and cost-effective, reducing downtime and labor costs.

This model is not recommended for potable water. For potable water applications, choose the Zurn Wilkins 350XL Lead-Free DCVA series.

Features & Benefits

• Reliable Backflow Protection – Prevents backpressure and backsiphonage in commercial and industrial water systems.

• EZSwap™ Removable Pressure Vessel – Simplifies flushing, winterization, and off-line maintenance, saving time and labor.

• Durable Construction – Reinforced nylon housing and stainless-steel components resist corrosion, UV exposure, and mineral build-up.

• Quick Service Access – Checks and internals can be accessed without removing the device from the line.

• Cost Savings – Reduces repair and kit costs by up to 75% over the backflow preventer’s lifecycle.

• Multiple Sizes Available – From 3/4" up to 2" to meet a wide range of system needs.

Specifications

• Model: Zurn Wilkins 350

• Size: 2" (also available in 3/4", 1", 1-1/4", 1-1/2")

• Maximum Working Pressure: 175 PSI

• Maximum Temperature: 180°F

• Hydrostatic Test Pressure: 350 PSI

• Body Material: Bronze (3/4"–1"), Reinforced Nylon (1-1/4"–2")

• Elastomers: FDA-approved silicone and Buna-N

• Springs & Hardware: Stainless Steel (300 Series)

• Connections: Threaded ANSI B1.20.1

• Certifications: ASSE® 1015, CSA® B64.5, IAPMO®, AWWA C510, USC Foundation for Cross Connection Control Approved, UL®/C-UL® Classified (less shut-off valves)

• Weight: Approx. 22 lbs (10 kg) with ball valves

Installation Tips

• Install per local plumbing codes and manufacturer instructions.

• Mount between 12"–30" above grade with proper drainage.

• Ensure adequate side clearance for testing and maintenance.

• For below-grade installations, provide proper drainage to avoid submersion.

• Use a blow-out flush fitting (BOF) for quick winterization and freeze protection.

FAQs

Q: Can this backflow preventer be used for drinking water?
No. The 350 series is for non-potable applications only. For potable water, use the Zurn Wilkins 350XL Lead-Free DCVA.

Q: What types of hazards does this preventer protect against?
It protects against low health hazard backflow caused by both backsiphonage and backpressure of polluted water.

Q: How often should it be tested?
Backflow preventers should be tested annually or as required by local codes.

Q: Is maintenance complicated?
Not at all. The EZSwap™ pressure vessel allows easy removal for flushing, repair, or winterization—saving both time and costs.