Description

WATTS®, F191637, Reduced Pressure Zone Backflow Preventer, Inline, Series: 957-FS, 2-1/2 in Nominal, Flanged End Style, 175 psi Pressure, 140 to 33 deg F, Outside Stem and Yoke Gate Valve Ball Valve/Gate Valve, Reduced Pressure Zone Backflow, Media: Water, Stainless Steel Body, 6-1/2 in H x 30-3/4 in W x 9-3/16 in D Dimensions, Domestic

Features:

• Patented torsion spring check modules for ease of serviceability
• Groove couplings for ease of installation and pipe alignment
• Cubic feet per minute meter
• No special tools required for servicing
• Compact design allows small enclosures to be used
• Features a flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve
• 304 (Schedule 40) stainless steel housing and sleeve
• The maximum working pressure is 175 psi (12.06 bar)

Standards/Approval:

• 1-UL Listed
• ASSE 1013
• CSA B64.4
• cULus Classified
• FM Approved
• NSF/ANSI 691-G
• PROP65: Cancer and Reproductive Harm www.P65Warnings.ca.gov

Warranty:

1 Year

Backflow Type	Reduced Pressure Zone
Ball Valve/Gate Valve Type	Outside Stem and Yoke Gate Valve
Body Material	Stainless Steel
Dimensions	6-1/2 in H x 30-3/4 in W x 9-3/16 in D
Domestic/Import	Domestic
End Style	Flanged
Media	Water
Nominal Size	2-1/2 in
Pressure Rating	175 psi
Series	957-FS
Temperature Rating	140 to 33 deg F
Type	Inline
Manufacturer	Watts Regulator Company