Zurn Wilkins 212-350ASTOSY 2-1/2" Backflow Preventer | Stainless Steel DCVA with OS&Y Gate Valves

Zurn Wilkins 2-1/2" 350ASTOSY Backflow Preventer | Stainless Steel DCVA with OS&Y Gate Valves.

Product Overview:

Ensure reliable backflow prevention in your potable water system with the Zurn Wilkins 212-350ASTOSY 2-1/2" Double Check Valve Assembly. Built from corrosion-resistant 304L stainless steel, this backflow preventer is engineered for long-term performance in commercial, municipal, and industrial applications. The full-port OS&Y gate valves allow for optimal system control, while the compact design makes it ideal for retrofits and installations in tight spaces.

This model is part of Zurn’s 350AST Series—trusted nationwide for safeguarding water systems against the reverse flow of non-health hazard contaminants. Whether you’re upgrading an existing system or designing a new build, this backflow assembly delivers code-compliant protection and ease of service.

Features & Benefits:

• Optimized for Backflow Prevention: Prevents reverse flow of potentially contaminated water

• Lead-Free Construction: Fully compliant with NSF/ANSI 372 for potable water systems

• Compact Profile: Short lay length simplifies installation in small mechanical rooms

• Full Port OS&Y Gate Valves: Ensures maximum water flow and positive system shutoff

• In-Line Serviceability: Access check valves and internal components without removing the unit

• Retrofit Compatible: Easily replace older units with the 300ASTR retrofit option

• Versatile Mounting: Approved for horizontal and vertical installation orientations

Specifications:

• Valve Size: 2-1/2"

• Body & Cover Material: 304L Stainless Steel

• Check Valve Components: NORYL™, Stainless Steel, EPDM (FDA-Approved), Buna-N O-Rings

• Working Pressure: 175 PSI

• Hydrostatic Test Pressure: 350 PSI

• Temperature Range: Up to 140°F

• End Connections:

  • Grooved Ends: AWWA C606

  • Flanged Ends: ANSI B16.1 Class 125

• Standards & Approvals:

  • ASSE® 1015 Listed

  • AWWA C510 & C550 Compliant

  • FM® Approved, UL® and C-UL® Classified

  • CSA® Certified, IAPMO® Listed

  • NSF® 61 & 372 Certified

  • USC Foundation Approved

Installation Tips:

• Install 12"–30" above grade with accessible drain clearance

• Maintain enough space on both sides for testing and maintenance

• Ensure the assembly is not submerged; mount above flood levels

• Follow all relevant plumbing and building codes

• Suitable for vertical or horizontal installation where code permits

FAQs:

Q: What kind of backflow does this valve prevent?
A: This is a double check backflow preventer designed to stop back pressure and back siphonage in non-health hazard applications.

Q: Is it certified for potable water use?
A: Yes, it meets NSF/ANSI 372 and 61 requirements for lead-free potable systems.

Q: Can I use this for retrofitting an older backflow assembly?
A: Absolutely, this unit is compatible with the Zurn 300ASTR retrofit replacement model.

Q: Are the gate valves included?
A: Yes, full-port OS&Y (open stem & yoke) gate valves are included and pre-assembled.

Q: Is it serviceable without disconnecting from the pipe?
A: Yes, internal components are accessible in-line for fast, efficient maintenance.