NOTICE: Product images may vary from the actual item due to differences in size or configuration options.

The Wilkins 34-760DRBS is a dual check valve backflow preventer with intermediate atmospheric vent designed for boiler fill water lines, providing reliable protection against backsiphonage and backpressure.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Pressure: 175 PSI
• Maximum Working Temperature: 210°F
• Notable Certifications: ASSE 1012, CSA B64.3
• Connection Type: FNPT union connections

Other Related Variants:

• None specified

Materials:

• Main valve body: Forged Brass
• Elastomers: EPDM (FDA approved)
• Elastomers: Buna Nitrile (FDA approved)
• Springs: Stainless Steel, 300 Series

Typical Installation:

The Zurn 34-760DRBS must be installed with provisions to collect spillage from the vent port through an air gap or other means. The vent port should never be directly piped into a drainage ditch, sewer, or pump, and under no circumstances should the vent port or drain line be plugged. Local codes shall govern installation requirements. The installation shall be made so that no part of the unit can be submerged and shall be installed downstream of an inlet shut-off valve in an accessible location for boiler fill applications.

Standards Compliance:

CSA Certified B64.3; ASSE Listed 1012; ANSI B1.20.1; ANSI B16.22

Features & Benefits:

• Dual Backflow Protection: Protects against both backsiphonage and backpressure of polluted water into the potable water supply.
• High Temperature and Pressure Rating: Handles working temperatures up to 210°F and pressures up to 175 PSI for demanding applications.
• Durable Construction: Forged brass body with stainless steel springs and FDA-approved elastomers ensure long-lasting performance.
• Intermediate Atmospheric Vent: Provides visible indication of check valve failure and additional protection through atmospheric discharge.

FAQ

Q: Can the Zurn Wilkins 34-760DRBS be installed in any orientation?

A: Yes, the unit may be installed horizontally or vertically, but must be positioned so that no part of the unit can be submerged and the vent port must discharge through an air gap.

Q: What is the difference between the standard and "C" option for the Wilkins 34-760DRBS?

A: The standard version features FNPT (female) threaded union inlet and outlet connections, while the "C" option has FC (female) copper sweat union inlet and outlet connections.

Q: Why might water spill from the vent port on my 34-760DRBS?

A: Under certain conditions, the Model 760 will spill water from the vent port as part of its normal operation. This is why provisions must be made to collect spillage through an air gap, and the vent port should never be plugged or directly piped into drainage systems.

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