Series 957N 8 in. Stainless Steel Flanged Backflow Preventer

Part #W957NOSYX  |  Item #2148554  |  Manufacturer Part #0111594

$19,784.80 EACH

Valve Size:

Packaging Info:
  • Quantity Per 
  • Each: 1
  • Inner pack: 1

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Product Details

  • 304 (schedule 40) stainless steel housing and sleeve
  • UL and FM outside stem and yoke resilient seated gate valves
  • Approved for horizontal N pattern installation
  • Replaceable check disc rubber
  • Bottom mounted cast stainless steel relief valve
  • Compact design allows small enclosures to be used
  • Patented torsion spring check modules for ease of serviceability
  • Groove couplings for ease of installation and pipe alignment
  • The maximum working pressure is 175 psi (12.06 bar)
  • 70% lighter than traditional designs

Lead Law Compliant



ADA Compliant: No

ANSI Specifications: ANSI 61-G

ASSE Standards: ASSE 1013

AWWA Specifications: AWWA C-511 1997

BAA Compliant: Yes

CSA Certified: CSA B64.4

Collection: Series 957N

Color Finish: Stainless Steel

Color Finish Category: Stainless Steel

Depth: 67-19/50 in

End Connection 1: Flanged

End Connection 2: Flanged

End Connections: Flanged

FM Approved: Yes

Handle Material: Steel

Height: 36-7/8 in

High Pressure: 175

IAPMO Listed: No

Installation Type: Horizontal

Lead Law Compliant: Yes

Length: 49-3/4 in

Material: Stainless Steel

Material Type: 304

Maximum Temperature: 110

NSF Certified: Yes

NSF Specifications: NSF 61-G

Number of Handles: Two Handle

Pressure Class: 400#

Recommended Valve Application: Health Hazard, Water

Schedule Class: 40

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

UL Listed: Yes

Valve Body Material: Forged Brass

Valve Body Style: N Pattern

Valve Disc Material: Rubber

Valve Operator: Wheel Handle

Valve Seat Material: PTFE

Valve Size: 8 in

Valve Stem: Outside

Valve Type: Reduced Pressure Zone Assembly

Weight: 558

Width: 67-1/2 in