Description
Zurn Wilkins 1-350 1″ DCVA Double Check Backflow Preventer.
Product Overview
The Zurn Wilkins 1-350 Double Check Valve Assembly (DCVA) provides reliable backflow prevention for low-hazard, non-potable water applications. Designed to guard against both backsiphonage and backpressure, this assembly ensures that polluted water does not re-enter your supply line.
Constructed with a bronze body and reinforced nylon housing, the 1-350 combines strength and corrosion resistance with ease of service. Its EZSwap™ removable pressure vessel allows for fast flushing, winterization, and simple maintenance, reducing downtime and labor costs.
Note: This model is not recommended for potable water applications. For potable systems, consider the Zurn Wilkins 350XL Lead-Free DCVA series.
Features & Benefits
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Trusted Backflow Protection – Prevents both backsiphonage and backpressure in low-hazard, non-potable water systems.
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EZSwap™ Removable Pressure Vessel – Easily removed with a flush tool for quick flushing, winterization, or off-line service.
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Durable Construction – Bronze valve body and reinforced nylon housing resist corrosion, mineral build-up, and outdoor exposure.
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Stainless Steel Hardware – Shut-off handles, fasteners, and struts provide long-lasting reliability.
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Quick Service Access – First and second check assemblies can be maintained without removing the valve from the line.
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Cost-Efficient Maintenance – Repair costs and downtime are reduced, saving up to 75% over the product’s lifecycle.
Specifications
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Model: Zurn Wilkins 350
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Size: 1″
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Body Material: Bronze (ASTM B 584)
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Housing: Reinforced Nylon
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Elastomers: FDA-approved Silicone and Buna Nitrile
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Internals: Delrin, NSF Listed
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Springs & Hardware: Stainless Steel, 300 Series
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Ball Valves: Cast Bronze
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Max Working Pressure: 175 PSI
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Max Working Temperature: 180°F
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Hydrostatic Test Pressure: 350 PSI
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End Connections: Threaded ANSI B1.20.1
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Weight: Approx. 6 lbs (with ball valves)
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Certifications: ASSE® 1015, CSA® B64.5, IAPMO®, AWWA C510, USC Foundation Approved, UL®/C-UL® Classified (less shut-off valves)
Installation Tips
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Install according to local plumbing codes and manufacturer instructions.
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Mount at 12″–30″ above grade with adequate drainage.
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Allow sufficient clearance for testing and servicing.
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If installed below grade, ensure proper drainage to avoid submersion.
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Use blow-out/flush fittings for quick winterization and freeze protection.
FAQs
Q: Can the 1-350 be used in drinking water systems?
No, this model is not intended for potable water. Use the Zurn Wilkins 350XL Lead-Free series for potable applications.
Q: Where is the 1″ 350 typically used?
It is commonly installed in irrigation, HVAC loops, fire protection bypasses, and other low-hazard non-potable systems.
Q: How often should it be tested?
Annual testing is required in most jurisdictions, or more frequently depending on local code.
Q: Is servicing complicated?
Not at all. The EZSwap™ pressure vessel allows off-line service, making repairs quick and safe.
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