The Wilkins 34-760 is a dual check valve backflow preventer with intermediate atmospheric vent designed for boiler fill and hydronic systems, protecting against both backsiphonage and backpressure.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Water Pressure: 175 PSI
• Maximum Working Water Temperature: 210°F
• Notable Certifications: ASSE 1012, CSA B64.3
• Threaded Connections: ANSI B1.20.1

Other Related Variants:

• 12-760: 1/2 Inch version

Materials:

• Forged Brass body
• EPDM elastomers (FDA approved)
• Buna Nitrile elastomers (FDA approved)
• Stainless Steel springs (300 Series)

Typical Installation:

The Wilkins 34-760 must be installed with provisions to collect spillage through an air gap or other means, with the vent port never directly piped into a drainage ditch, sewer, or pump. The vent port or drain line must never be plugged, and the installation shall be made so that no part of the unit can be submerged. Installation must be in accordance with manufacturer's instructions, local codes, and the latest edition of the Uniform Plumbing Code.

Standards Compliance:

CSA Certified B64.3; ASSE Listed 1012

Features & Benefits:

• Backflow Protection: Dual check design protects against both backsiphonage and backpressure of polluted water into potable water supply.
• High-Temperature Capability: Handles working temperatures up to 210°F with emergency back pressure temperature rating of 250°F for demanding applications.
• Durable Construction: Forged brass body with stainless steel springs and FDA-approved elastomers ensures long-lasting reliability.
• Atmospheric Vent Protection: Intermediate atmospheric vent provides additional safety layer for boiler feed and hydronic system applications.

FAQ

Q: Can the Zurn 34-760 vent port be connected directly to a drain line?

A: No, the vent port should never be directly piped into a drainage ditch, sewer, or pump. Provisions must be made to collect spillage through an air gap or other means, and the vent port must never be plugged.

Q: What is the maximum working pressure for the Zurn 34-760?

A: The maximum working water pressure is 175 PSI, with a maximum working water temperature of 210°F and emergency back pressure temperature of 250°F.

Q: Can the Wilkins 34-760 be installed in a submerged location?

A: No, the installation must be made so that no part of the unit can be submerged. This is a critical safety requirement to ensure proper operation of the atmospheric vent.

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