Description

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.

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

Description