Zurn Wilkins 6-350ASTBG 6" Double Check Valve Assembly (DCVA) Stainless Steel Body Supervised Grooved Butterfly Valves Lead-Free

Zurn Wilkins 6-350ASTBG 6" Double Check Valve Assembly Backflow Preventer

Product Overview

The Zurn Wilkins 6-350ASTBG Double Check Valve Assembly (DCVA) provides reliable backflow prevention in commercial and industrial potable water applications. Engineered with a durable 304L stainless steel body, this unit ensures long-lasting protection against both back siphonage and back pressure, preventing contaminated water from entering clean supply lines.

Designed with supervised grooved butterfly valves for added safety and quick installation, this 6-inch backflow valve meets lead-free requirements and is fully certified for use across multiple plumbing and safety standards. Its short lay length makes it ideal for tight spaces, while corrosion-resistant materials enhance long-term performance.

Features & Benefits

• Compact, short lay length for installations in limited spaces

• Superior flow performance for systems with lower operating pressure

• Lead-free construction, compliant with NSF/ANSI 372

• 304L stainless steel body and cover for maximum corrosion resistance

• Supervised grooved butterfly valves for enhanced safety monitoring

• Easy access to checks for simplified testing and maintenance

• Certified to ASSE® 1015, AWWA C510/C550, CSA, UL, FM, and IAPMO standards

Specifications

• Model: 6-350ASTBG

• Size: 6 inch

• Body Material: 304L Stainless Steel

• Seat Material: NORYL™

• Elastomers: EPDM, FDA approved

• O-rings: Buna Nitrile (FDA approved)

• Pressure Rating: 175 PSI maximum working pressure

• Temperature Range: Up to 140°F (60°C)

• Hydrostatic Test Pressure: 350 PSI

• End Connections:

  • Grooved (AWWA C606)

  • Flanged (ANSI B16.1, Class 125)

• Compliance: ASSE® 1015, AWWA, UL, FM, CSA, NSF 61 & 372

Installation Tips

• Install in accordance with local plumbing and backflow prevention codes.

• Mount unit 12"–30" above grade with adequate drainage clearance.

• Ensure no part of the assembly can become submerged.

• Leave sufficient clearance on both sides for testing and maintenance.

• Position assembly in a horizontal or vertical orientation as approved.

FAQs

Q: What does a double check valve assembly do?
A DCVA prevents contaminated or polluted water from entering potable water systems by blocking back siphonage and back pressure.

Q: Is this model lead-free?
Yes, the 6-350ASTBG is certified lead-free under NSF/ANSI 372.

Q: Can this unit be installed vertically?
Yes, it is approved for both horizontal and vertical installation where local codes allow.

Q: What applications is this suitable for?
It is ideal for potable water lines in commercial, institutional, and light industrial facilities where a non-health hazard is present.