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Wilkins Model 350 bronze 3/4-inch double-check backflow preventer with top-mounted test cocks and removable pressure vessel

Wilkins Model 350 Double-Check Valve Assembly, 3/4 in Bronze

Brand: Zurn Industries, LLC
Save 24%
$590.65
$448.99
SKU 34-350FT
In Stock (23)

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The Wilkins Model 350 double-check valve assembly is a durable, serviceable backflow preventer designed for potable water protection where a low health hazard exists. Built with bronze bodies for 3/4" sizes and reinforced nylon housings for internal components, the 350 balances corrosion resistance with easy maintenance. It features full-port ball shutoff valves, top-mounted test cocks, and an EZSwap removable pressure vessel that reduces repair time and simplifies winterization and flushing.

  • Reliable construction: Cast bronze main valve body (3/4" and 1") with stainless steel fasteners for corrosion resistance and long field life.
  • Serviceable design: Removable EZSwap pressure vessel permits safe line flushing, quick winterization, and fast on-site repairs without removing the assembly from the line.
  • Fast-test capability: Top-mounted SAE test cocks and full-port ball valves allow efficient testing and shutoff during service.
  • Performance ratings: Typical ratings include 175 PSI maximum working pressure and 350 PSI hydrostatic test pressure; temperature range supports common potable water applications.
  • Compliance: ASSE® Listed 1015 and recognized by IAPMO and CSA (B64.5); designed to meet federal low-lead guidelines for potable water installations.
  • Easy installation: Compact footprint for 3/4" service, optional strainers and accessory kits available to simplify connection and protection on new or retrofit systems.

Ideal for irrigation and commercial plumbing where reliable backflow protection is required without a high health hazard, the Model 350 provides proven double-check protection with parts and repair kits widely available. Follow manufacturer installation and local code requirements for mounting height, drainage, and periodic testing; use the included technical specs and installation instructions for service intervals and replacement parts.

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Frequently Asked Questions

What pipe size and connections fit the Model 350?
This listing is for the 3/4 in. Model 350 with threaded connections; verify local code and connection type before ordering.
How do I service the pressure vessel and checks?
The EZSwap removable pressure vessel allows safe line flushing and quick access to internal checks for inspection or replacement.
What certifications and pressure ratings does this model have?
Model 350 is ASSE® Listed 1015, IAPMO- and CSA-recognized, typically rated to 175 PSI working pressure and 350 PSI hydrostatic test.

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