2 U009M2-QT-FS
Item Number: 88004138Brand - Watts
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- Size: 2 inch
- Weight: 36.2 lb
- Body Material: Bronze
- Maximum Working Pressure: 175 PSI
- Temperature Range: 33°F - 180°F
- Features SentryPlus Alert® flood detection sensor
- Quarter-turn ball valve shutoffs with tee handles
- Union connections for versatile installation
- Complies with ASSE 1013, AWWA C511, CSA B64.4
Description
Description
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Connections
- This backflow preventer assembly features union connections for straightforward installation into existing piping systems.
- The flood sensor, which detects excessive water discharge, can be activated using an add-on connection kit (sold separately).
- Connection kit options include BMS, cellular communication, or the Sensor Control Monitor for integration with BAS (via RS-485 Modbus) or the Nexa® platform (via Wi-Fi).
Drainage
Installation of a drain line is recommended, and an air gap is necessary when installing a drain line for the relief valve discharge. Proper drainage is required regardless of the flood sensor.

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Additional Details
This 2 inch Watts Series U009 Reduced Pressure Zone backflow preventer assembly is designed to protect potable water supplies from contamination due to backsiphonage or backpressure, adhering to national plumbing codes and water authority requirements.
Its compact, modular design allows for easy maintenance with a single access cover for in-line repairs.
Key Components
- Bronze body construction for durability
- Union connections for versatile installation
- Quarter-turn ball valve shutoffs with tee handles
- Top mounted ball valve test cocks
- Two in-line, independent check valves with captured springs
- Replaceable check seats
- Internal relief valve for reduced space requirements
- Flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve
Flood Sensor Activation
- The flood sensor is installed on the assembly exterior and relays a signal for notification in case of excessive water discharge.
- An add-on connection kit is required to activate the flood sensor. Without the connection kit, the sensor is a passive component and will not communicate with any other device.
- Available connection kit options include BMS, cellular communication, and the Sensor Control Monitor, enabling integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
Ease of Maintenance
- Single access cover and modular check construction
- Top entry to all internals for immediate accessibility
- No special tools required for servicing
- Replaceable seats for economical repair
Specifications
General
- Model: U009M2-QT-FS
- Size: 2 inch
- Body Material: Bronze
- Connection Type: Union
- Shutoff Valves: Quarter-Turn Ball Valves with Tee Handles
- Check Valves: Two in-line, independent
- Relief Valve: Internal Pressure Differential
- Test Cocks: Ball Type, Screwdriver Slotted
- Flood Sensor: Yes, with SentryPlus Alert® Technology
- Seats: Replaceable Polymer
- Discs: Silicone Rubber
- Relief Valve Seat Material: Removable Stainless Steel
- Cover Bolts: Stainless Steel
Performance
- Maximum Working Pressure: 175 PSI (12 bar)
- Temperature Range: 33°F - 180°F (0.5°C - 82°C)
Dimensions & Weight
- Length (A): 27 3/8 inches (695 mm)
- Width (B): 8 3/4 inches (222 mm)
- Height (C): 4 1/4 inches (108 mm)
- Weight: 32.75 lbs (14.9 kg)
Certificates & Approvals
- USC Manual 8th Edition
- ASSE No. 1013
- AWWA C511
- CSA B64.4
- IAPMO File No. 1563
- ASSE Approved
- AWWA Approved
- CSA Approved
- IAPMO Approved
- Approved by Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
FAQs
What is the primary function of the Watts Series U009 Reduced Pressure Zone assembly?
How does the flood sensor function, and what is required to activate it?
What are the key materials used in the construction of this backflow preventer?
What are the maximum operating pressure and temperature ratings for this device?
What standards and approvals does this backflow preventer meet?
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