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
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Reliable Protection – Guards against low-hazard backpressure and backsiphonage.
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Service-Friendly – EZSwap™ removable pressure vessel simplifies repair.
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Durable Design – Reinforced nylon housing with stainless-steel struts and handles.
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Quick Maintenance – First and second checks are accessible without full removal.
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Certified Compliance – Meets ASSE®, CSA®, IAPMO®, and AWWA requirements.
Specifications
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Model: Zurn Wilkins 350
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Size: 1-1/4"
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Body Material: Reinforced Nylon
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Elastomers: FDA-approved silicone & Buna-N
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Internals & Springs: Stainless Steel / Delrin
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Max Working Pressure: 175 PSI
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Max Temperature: 180°F
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Hydrostatic Test Pressure: 350 PSI
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Connection Type: Threaded ANSI B1.20.1
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Weight: 19 lbs (with ball valves)
Installation Tips
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Mount between 12"–30" above floor or grade.
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Provide drainage for outdoor or below-grade installations.
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Follow local codes for annual testing.
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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.
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