Zurn Wilkins 3/4" 350 Double Check Valve Assembly, Replaceable Pressure Vessel, Non-Potable

Item Number: 34-350
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$444.00
In Stock (10)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Zurn Wilkins
  • Size: 3/4 inch
  • Weight: 5.0 lb
  • Application: Non-potable water, low health hazard
  • Maximum Working Pressure: 175 PSI
  • EZSwap® Removable Pressure Vessel
  • Main Body Material: Low Lead Cast Bronze
  • Vessel Material: UV Resistant Reinforced Nylon
  • Certifications: ASSE® 1015, CSA B64.5
  • End Connections: Threaded

Description

The Zurn Wilkins 3/4" 350 Double Check Valve Assembly provides essential protection against backsiphonage and backpressure in non-potable water systems where a potential health hazard does not exist. Featuring a low lead cast bronze body and a durable, UV-resistant reinforced nylon EZSwap® removable pressure vessel, it ensures longevity and easy maintenance. The EZSwap design facilitates cost-effective repairs, quick winterization, and line flushing, helping save water and reduce labor costs. This 3/4-inch threaded assembly is ASSE® 1015, CUPC®, and CSA B64.5 certified, guaranteeing reliable performance for various water line installations. Item number 34-350.

Help Me Connect

This Zurn Wilkins 3/4" 350 Double Check Valve Assembly features threaded end connections (ANSI B1.20.1) for secure installation into your plumbing system. It is designed for water lines protecting against backsiphonage and backpressure in low health hazard, non-potable water applications.

For optimal performance and compliance, installation should follow manufacturer instructions and local codes. The assembly should be mounted at a minimum of 12 inches and a maximum of 30 inches above adequate drains, ensuring sufficient side clearance for testing and maintenance. If underground installation is necessary, proper drainage must be provided to prevent submersion of the device.

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Additional Details

The Zurn Wilkins 3/4" 350 Double Check Valve Assembly is designed for installation on water lines to protect against backsiphonage and backpressure of polluted water into the water supply, specifically for low health hazard, non-potable water applications. This assembly ensures protection where a potential health hazard does not exist.

Featuring the patented and innovative EZSwap® removable pressure vessel, this assembly allows for simple, cost-effective maintenance, quick winterization, and straightforward line flushing. The design focuses on water savings and reduces labor and repair kit costs over the product's lifecycle.

Construction & Durability

  • The main valve body and ball valves are constructed from Low Lead Cast Bronze ASTM B584.
  • The EZSwap Pressure Vessel is made from durable UV resistant reinforced nylon, offering resistance to corrosion and mineral build-up, ideal for harsh outdoor conditions.
  • Fasteners, handles, springs, and struts are made from 300 series Stainless Steel for enhanced corrosion resistance.
  • Elastomers consist of Buna Nitrile and Silicone (both FDA approved).
  • Internals are Acetal Homopolymer (Delrin®) (NSF Listed).

Maintenance & Operation

  • The first and second checks are accessible for maintenance without removing the entire device from the line.
  • The replaceable pressure vessel design simplifies repairs and can be serviced off-line, reducing downtime.

Specifications

General

  • Product Type: Double Check Valve Assembly
  • Model: 350
  • Size: 3/4 inch
  • Application: Non-potable water, low health hazard protection

Performance

  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 180°F
  • Hydrostatic Test Pressure: 350 PSI

Materials

  • Main Valve Body: Low Lead Cast Bronze ASTM B584
  • Ball Valves: Cast Bronze ASTM B584
  • Elastomers: Buna Nitrile (FDA approved), Silicone (FDA approved)
  • Fasteners: 300 series Stainless Steel
  • Handles: 300 series Stainless Steel
  • Housing (Vessel): UV Resistant Reinforced Nylon
  • Internals: Acetal Homopolymer (Delrin®) (NSF Listed)
  • Springs: 300 series Stainless Steel
  • Struts: 300 series Stainless Steel

Connections

  • End Connections: Threaded (ANSI B1.20.1)

Certificates & Approvals

  • ASSE® Listed: 1015
  • CUPC® Listed: Yes
  • CSA B64.5: Certified
  • AWWA Compliant: C510
  • Approved by: Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • UL® Classified: Yes (less shut-off valves only)
  • C-UL® Classified: Yes (less shut-off valves only)
  • IAPMO® Listed: Yes

FAQs

What is the primary application of the Zurn Wilkins 3/4" 350 Double Check Valve Assembly?

It is designed for installation on water lines to protect against backsiphonage and backpressure of polluted water into the water supply, specifically for low health hazard, non-potable water applications where a potential health hazard does not exist.

What is the main benefit of the EZSwap® removable pressure vessel?

The EZSwap® vessel allows for simple, cost-effective maintenance and repairs, straightforward line flushing, and quick winterization. It can be serviced off-line, reducing labor and repair costs over the product's lifecycle.

What materials are used in the construction of this backflow preventer?

The main valve body and ball valves are made from low lead cast bronze. The EZSwap Pressure Vessel is UV resistant reinforced nylon, and internal components like fasteners, handles, springs, and struts are 300 series stainless steel.

What are the maximum operating pressure and temperature ratings for this model?

This 3/4" 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 the Zurn Wilkins 3/4" 350 Double Check Valve Assembly hold?

It is ASSE® Listed 1015, CUPC® Listed, and CSA® Certified B64.5. It is also AWWA Compliant C510 and approved by the Foundation for Cross Connection Control and Hydraulic Research.