Zurn Wilkins - 350ASTL Series, Stainless Steel - Backflow Preventer

The Zurn Wilkins 350 ASTL series is a medium-hazard, high-performance, low-head loss, Corrosion-resistant double-check backflow preventer, designed for installation on potable water lines to protect against both back siphonage and backpressure of polluted water into the potable water supply

Features and Benefits

• Short lay-length for small space installation
• Reliable performance and improved flow characteristics from patented Compound Check, allowing for installation in lower-pressure systems
• Ideal for any backflow replacement
• Lower maintenance costs from corrosion resistance of the stainless body

Typical Application

Designed for installation on potable water lines to protect against both back siphonage and backpressure of polluted water into the potable water supply. The Model 350AST shall provide protection where a potential health hazard does not exist. Ideal for use where Lead-Free* valves are required.

Standard Compliance (Horizontal and Vertical)

• ASSE® Listed 1015
• AWWA Compliant C510 (with gates only), and C550
• UL® Classified
• C-UL® Classified
• FM® Approved
• CSA® Certified
• IAPMO® Listed
• Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
• NSF® Listed-Standard 61, Annex G*
• Certified to NSF/ANSI 372* by IAPMO R&T
• Watermark

*(0.25% max. weighted average lead content)

• Sizes: 100, 150, 200, 250mm
• Maximum Working Water Pressure: 12 Bar
• Maximum Working Water Temperature: 60°C
• Hydrostatic Test Pressure: 24 Bar
• End Connections: Grooved for Clamp System AWWA C606

Materials

• Main Valve Body: 304L Stainless Steel
• Access Covers: 304L Stainless Steel
• Internals: Stainless Steel, 300 Series NORYL™, NSF listed
• Fasteners and Springs: Stainless Steel, 300 Series
• Seal Ring: EPDM (FDA Approved)
• O-Ring: Buns Nitrile (FDA Approved)

Flow Characteristics

Model 350 AST 4" (Standard & Metric)

Flow Rates(l/s)

Model 350 AST 6", 8" (Standard & Metric)

Flow Rates (l/s)

Dimensions and Weights

The Double Check Backflow Prevention Assembly shall be certified to NSF/ANSI 372, ASSE® Listed 1015, and installed with full port gate valves. The main body and access cover shall be 304L Stainless Steel, the seat ring and check valve shall be NORYL™, the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The checks shall be accessible for maintenance without removing the device from the line. The Double Check Backflow Prevention Assembly shall be a ZURN WILKINS Model 350AST

Typical Installation

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for testing and maintenance.