3/4 009M3-QT-FS
Item Number: 88004058Brand - Watts
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- Size: 3/4 inch
- Weight: 5.5 lb
- Body Material: Bronze
- Connection Type: NPT inlet and outlet
- Shutoff Valves: Quarter turn ball valve
- Features SentryPlus Alert® flood sensor
- Maximum Operating Pressure: 175 psi
- Water Temperature Range: 33°F – 180°F
- Compact modular design for easy maintenance
Description
Description
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Connections
- The assembly features NPT inlet and outlet connections for straightforward integration into existing plumbing systems.
- Equipped with quarter turn ball valve shutoffs for easy operation and system isolation.
Flood Sensor Activation
An add-on connection kit is required to activate the flood sensor for alert functionality. Without this kit, the sensor operates as a passive component. Connection kit options include those compatible with BMS, cellular communication, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
This 3/4 inch reduced pressure zone assembly backflow preventer helps prevent the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements.
Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs.
WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing, consult your local water authority, building, and plumbing codes.
Features & Design
- Bronze body construction ensures durability for long-lasting performance.
- Designed with NPT inlet and outlet connections for standard plumbing integration.
- Includes quarter turn full port resilient seated ball valve shutoffs with tee handles.
- Features a single access cover and modular check construction for ease of maintenance and in-line repairs.
- Top entry allows for immediate accessibility to all internal components.
- Contains two in-line, independent check valves with captured springs for safe maintenance.
- Replaceable check seats for economical repair and prolonged service life.
- An internal relief valve is included for reduced installation clearances and space-saving design.
- Large body passages provide low pressure drop, enhancing flow efficiency.
- Equipped with ball valve test cocks (screwdriver slotted) for easy testing.
- A flood sensor with SentryPlus Alert® technology detects continuous discharge from the relief valve, helping to prevent costly water damage.
- An add-on connection kit is required to activate the flood sensor; without it, the sensor is a passive component without communication.
- When paired with a connection kit, the sensor can integrate with a Sensor Control Monitor to deliver maintenance alerts via BAS (RS-485 Modbus) or the Nexa® platform (Wi-Fi).
- No special tools are required for servicing.
Specifications
General
- Product Type: Reduced Pressure Zone Assembly Backflow Preventer
- Nominal Size: 3/4 inch
- Body Material: Bronze
- Connection Type: NPT inlet and outlet connections
- Shutoff Valves: Quarter turn, full port, resilient seated ball valves with tee handles
- Check Valves: Two in-line, independent check valves
- Relief Valve: Internal pressure differential relief valve
- Check Seats: Replaceable polymer check seats
- Disc Material: Silicone rubber (first check, second check, relief valve)
- Cover Bolts: Stainless steel
- Test Cocks: Four resilient seated, ball type (screwdriver slotted)
- Flood Sensor: SentryPlus Alert® technology
Performance
- Maximum Supply Pressure: 175 psi (12.1 bar)
- Water Temperature Range: 33°F – 180°F (0.5°C – 75°C)
Certificates & Approvals
- USC
- ASSE No. 1013
- AWWA C511-92
- CSA B64.4
- IAPMO File No. 1563
- Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California