Zurn Wilkins 1" 350 Double Check Valve Assembly, Replaceable Pressure Vessel, Non-Potable
Item Number: 1-350
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$489.75
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Brand - Zurn Wilkins
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- Primary Use: Non-potable water line protection.
- Weight: 7.0 lb
- Main Valve Body Material: Low Lead Cast Bronze.
- EZSwap® Removable Pressure Vessel for easy maintenance.
- Corrosion-resistant stainless steel and reinforced nylon construction.
- Maximum Working Water Pressure: 175 PSI.
- Maximum Working Water Temperature: 180°F.
- ASSE® Listed 1015.
- CSA® Certified B64.5.
Description
Description
The Zurn Wilkins 1" 350 Double Check Valve Assembly is a backflow preventer designed to protect non-potable water lines from backsiphonage and backpressure in low health hazard applications. It features an innovative EZSwap® removable pressure vessel, allowing for simple, cost-effective maintenance, quick winterization, and reduced repair costs by being serviceable off-line. Constructed from low lead cast bronze, stainless steel, and UV-resistant reinforced nylon, it offers superior durability and corrosion resistance. Rated for 175 PSI and 180°F, this assembly is ASSE® Listed 1015 and CSA® Certified B64.5, ensuring reliable performance.
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Connections
- This 1 inch backflow preventer features threaded end connections conforming to ANSI B1.20.1 standards.
- It is designed to connect directly into existing piping systems with compatible 1 inch threaded fittings.

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Additional Details
The Zurn Wilkins 1" 350 Double Check Valve Assembly with Replaceable Pressure Vessel is designed for installation on water lines to protect against both backsiphonage and backpressure of polluted water into the water supply. It provides protection where a potential health hazard does not exist, ideal for low health hazard, non-potable water applications.
Features
- The patented and innovative EZSwap® removable pressure vessel allows for simple, cost-effective maintenance and repairs, straightforward line flushing, quick winterization, and water savings.
- Stainless steel shut-off valve handles, hardware, and struts are corrosion-resistant.
- Durable UV resistant reinforced nylon EZSwap Pressure Vessel resists corrosion and mineral build-up to better withstand harsh outdoor conditions.
- Designed to ensure water savings.
- Includes full port ball valves.
- First and second checks are accessible for maintenance without removing the device from the line.
Materials
- Main Valve Body: Low Lead Cast Bronze ASTM B584
- Ball Valves: Cast Bronze ASTM B584
- Elastomers: Buna Nitrile (FDA approved) and Silicone (FDA approved)
- Fasteners: 300 series Stainless Steel
- Handles: 300 Series Stainless Steel
- Housing: Reinforced Nylon
- Internals: Acetal Homopolymer (Delrin®) (NSF Listed)
- Springs: 300 series Stainless Steel
- Struts: 300 series Stainless Steel
Application
- Protects against backsiphonage and backpressure of polluted water.
- Suitable for low health hazard, non-potable water applications.
Specifications
- Size: 1 inch
- Main Valve Body Material: Low Lead Cast Bronze ASTM B584
- Ball Valve Material: Cast Bronze ASTM B584
- Elastomer Material: Buna Nitrile (FDA approved), Silicone (FDA approved)
- Fastener Material: 300 series Stainless Steel
- Handle Material: 300 Series Stainless Steel
- Housing Material: Reinforced Nylon
- Internal Material: Acetal Homopolymer (Delrin®) (NSF Listed)
- Spring Material: 300 series Stainless Steel
- Strut Material: 300 series Stainless Steel
- Maximum Working Water Pressure: 175 PSI
- Maximum Working Water Temperature: 180°F
- Hydrostatic Test Pressure: 350 PSI
- End Connections: Threaded (ANSI B1.20.1)
Certificates & Approvals
- ASSE® Listed 1015
- CUPC® Listed
- CSA® Certified B64.5
- AWWA Compliant C510
- Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
- UL® Classified (less shut-off valves only)
- C-UL® Classified (less shut-off valves only)
- IAPMO® Listed
FAQs
What is the primary application of the Zurn Wilkins 1" 350 Double Check Valve Assembly?
This backflow preventer is designed for installation on water lines to protect against backsiphonage and backpressure of polluted water. It is suitable for low health hazard, non-potable water applications.
What are the main benefits of the EZSwap® removable pressure vessel?
The EZSwap® removable pressure vessel allows for simple, cost-effective maintenance, straightforward line flushing, and quick winterization. It reduces repair time and costs by being serviceable off-line.
What materials are used in the construction of this backflow preventer?
The main valve body and ball valves are made of low lead cast bronze. Elastomers include Buna Nitrile and Silicone. The housing is reinforced nylon, and internal components are Acetal Homopolymer. Fasteners, handles, springs, and struts are 300 series stainless steel.
What are the maximum operating pressure and temperature ratings for this model?
The Zurn Wilkins 1" 350 Double Check Valve Assembly has a maximum working water pressure of 175 PSI and a maximum working water temperature of 180°F.
What certifications does this backflow preventer hold?
This model is ASSE® Listed 1015, CUPC® Listed, CSA® Certified B64.5, AWWA Compliant C510, and IAPMO® Listed. It is also approved by the Foundation for Cross Connection Control and Hydraulic Research.