6 in. 304 Stainless Steel Flanged Backflow Preventer

Part #W957NOSYU  |  Item #2148549  |  Manufacturer Part #0111593

Valve Size:

6 in

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Product Details

  • Replaceable check disc rubber
  • Extremely compact design
  • 70% lighter than traditional designs
  • Groove fittings allow integral pipeline adjustment
  • Patented torsion spring checks provide lowest pressure loss
  • Unmatched ease of serviceability
  • Bottom mounted cast stainless steel relief valve
  • Lead-Free

Lead Law Compliant



ADA Compliant: No

ANSI Specifications: ANSI 61 Annex G

ASSE Standards: ASSE 1013

AWWA Specifications: AWWA C-511

Application: Health Hazard

CSA Certified: CSA B64.4

Color Finish: Stainless Steel

Color Finish Category: Blacks

Depth: 23-3/16 in

Diameter: 1/2 in

End Connection 1: Flanged

End Connection 2: Flanged

End Connections: Flanged

FM Approved: Yes

Height: 38-5/8 in

High Pressure: 175

IAPMO Listed: No

Installation Type: Horizontal

Lead Law Compliant: Yes

Length: 43-1/2 in

Maximum Pressure: 175 psi

Maximum Temperature: 140

NSF Certified: Yes

NSF Specifications: NSF 61G

Number of Handles: Two Handle

Recommended Valve Application: Water

Schedule Class: 40

Temperature Range: 33 to 140 Deg F (0.5 to 60 Deg C)

Type: W957NOSYU

UL Listed: Yes

Valve Body Material: Stainless Steel

Valve Body Style: N Pattern

Valve Disc Material: Rubber

Valve Operator: Wheel Handle

Valve Size: 6 in

Valve Type: Reduced Pressure Zone Assembly

Weight: 339

Width: 15 in