Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
Weight: 90.0 lb
Size: 2 1/2 inch
Valve Type: Grooved Gear Operated Butterfly with Tamper Switch
Orientation: Z-Pattern
Maximum Working Pressure: 175 PSI
Housing Material: 304 Stainless Steel
Integrated Flood Sensor with SentryPlus Alert technology
Approved: ASSE 1013, CSA B64.4, UL Classified, FM Approved, NSF Approved
Description
This Watts 2 1/2 inch 957 Series Reduced Pressure Zone (RPZ) backflow preventer safeguards potable water systems from contamination caused by backpressure or backsiphonage, ideal for health hazard applications. It features a compact design, a 304 stainless steel housing, and grooved gear operated butterfly valves with tamper switches for Z-pattern installation. An integrated flood sensor with SentryPlus Alert technology detects excessive relief valve discharges, offering enhanced monitoring capabilities when paired with an add-on connection kit. Rated for 175 PSI maximum working pressure, this lead-free assembly is ASSE 1013, CSA B64.4, UL, FM, and NSF approved.
Help Me Connect
Connections & Compatibility
This 2 1/2 inch backflow preventer features grooved connections for straightforward integration into your pipeline. It is designed for horizontal Z-pattern installation. The integrated flood sensor requires an add-on connection kit (not included) to enable communication features such as BMS, cellular alerts, or integration with the Nexa® platform via Wi-Fi or Modbus.
This Watts 2 1/2 inch 957 Series Reduced Pressure Zone (RPZ) backflow preventer is designed to protect potable water systems from contamination due to backpressure or backsiphonage, especially in health hazard applications.
The assembly features a Z-pattern installation and grooved gear operated butterfly valves with tamper switches.
Features
Prevents reverse flow of liquids due to backpressure or backsiphonage
Extremely compact design, lighter than traditional assemblies
Patented torsion spring checks provide lowest pressure loss
Unmatched ease of serviceability
Replaceable check disc rubber
Bottom-mounted cast stainless steel relief valve
Groove fittings for integral pipeline adjustment and ease of installation
Flood Sensor Technology
Integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve
When paired with an add-on connection kit (not included), the sensor activates to relay alerts for potential flooding events
Connection kit options include BMS, cellular communication, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi
Construction
304 (Schedule 40) stainless steel housing and sleeve
Lead Free* bronze body test cocks
EPDM, silicone, and Buna-N elastomers
Noryl and stainless steel torsion spring checks
Reversible silicone or EPDM check discs
300 Series stainless steel pins & fasteners
Stainless steel springs
Installation must be performed in accordance with all local requirements and manufacturer instructions. An add-on connection kit is required to activate the flood sensor for communication.
Specifications
General
Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
Series: 957
Size: 2 1/2 inch
Valve Type: Grooved Gear Operated Butterfly with Tamper Switch
FOCCCHR-USC Approved (excluding 10" N-patterns, 6" and 10" Z-patterns)
NSF Approved
Dimensions & Weight (2 1/2 inch)
G Dimension: 32 1/2 inch (826 mm)
H Dimension: 23 inch (584 mm)
I Dimension: 15 1/2 inch (394 mm)
J Dimension: 9 1/2 inch (241 mm)
M Dimension: 19 3/4 inch (502 mm)
P Dimension: 11 13/16 inch (300 mm)
Weight: 67 lb (30 kg)
FAQs
What is the primary function of the Watts 957Z-BFG-FS backflow preventer?
The primary function is to protect potable water systems from contamination that can occur due to backpressure or backsiphonage, especially in health hazard applications.
What type of connections does this backflow preventer use?
This 2 1/2 inch backflow preventer features grooved connections for both the inlet and outlet, designed for ease of installation and pipeline adjustment.
Does this model include a flood sensor?
Yes, it includes an integrated flood sensor with SentryPlus Alert® technology that detects excessive water discharges from the relief valve. To enable communication and alerts, an add-on connection kit is required and sold separately.
What certifications and approvals does this backflow preventer hold?
This Watts 957 Series RPZ assembly is ASSE 1013, CSA B64.4, UL Classified, FM Approved, AWWA C511-97, FOCCCHR-USC Approved, and NSF Approved for potable water applications.
What is the maximum operating pressure and temperature for this unit?
The maximum operating pressure for this backflow preventer is 175 PSI (12.1 bar), and its temperature range is 33°F to 140°F (0.5°C to 60°C).
