Zurn Wilkins 1-1/4" 350 DCVA Double Check Backflow Preventer.

Product Overview

The Zurn Wilkins 1-1/4" Model 350 DCVA provides commercial-grade backflow prevention with reinforced nylon housing and stainless-steel internals. Designed for non-potable applications, it prevents contaminated water from flowing back into clean lines due to backsiphonage or backpressure. The EZSwap™ pressure vessel streamlines flushing, winterization, and off-line servicing, helping reduce downtime and repair costs.

Features & Benefits

• Reliable Protection – Guards against low-hazard backpressure and backsiphonage.

• Service-Friendly – EZSwap™ removable pressure vessel simplifies repair.

• Durable Design – Reinforced nylon housing with stainless-steel struts and handles.

• Quick Maintenance – First and second checks are accessible without full removal.

• Certified Compliance – Meets ASSE®, CSA®, IAPMO®, and AWWA requirements.

Specifications

• Model: Zurn Wilkins 350

• Size: 1-1/4"

• Body Material: Reinforced Nylon

• Elastomers: FDA-approved silicone & Buna-N

• Internals & Springs: Stainless Steel / Delrin

• Max Working Pressure: 175 PSI

• Max Temperature: 180°F

• Hydrostatic Test Pressure: 350 PSI

• Connection Type: Threaded ANSI B1.20.1

• Weight: 19 lbs (with ball valves)

Installation Tips

• Mount between 12"–30" above floor or grade.

• Provide drainage for outdoor or below-grade installations.

• Follow local codes for annual testing.

• Use blow-out/flush fitting for fast winterization.

FAQs

Q: Is the 1-1/4" 350 suitable for irrigation systems?
Yes, it is commonly used for irrigation, HVAC loops, and other non-potable systems.

Q: What’s the main difference compared to smaller sizes?
Larger nylon body construction for higher flow rates and commercial use.