Watts - 1-1/4" Febco Vacuum Breaker

The FEBCO 765 Series 1-1/4" Pressure Vacuum Breaker protects against backsiphonage of non-potable or contaminated water into potable systems. It is ideal for use in high-risk applications such as irrigation systems, cooling towers, swimming pools, and industrial plants. Constructed with a durable bronze body and corrosion-resistant internal components, the 765 features a spring-loaded check valve and air relief valve that act together to provide reliable backflow protection. Designed for vertical orientation and easy in-line servicing, this PVB also includes two quarter-turn shutoff valves and resilient test cocks for simplified maintenance and field testing. Certified to ASSE 1020 standards, the 765 is also available with an optional freeze sensor for system monitoring.

Key Features:

• Integrated check valve and air inlet prevent backsiphonage events
• Bronze body ensures strength and corrosion resistance
• Top-serviceable internal components reduce downtime
• Engineered plastic bonnet protects against freeze damage
• Quarter-turn ball valves simplify installation and maintenance
• Test cocks facilitate field testing and compliance verification
• Optional freeze sensor alerts users of freezing risk via Wi-Fi

Construction & Durability:

• Body Material: Cast bronze (ASTM B584)
• Bonnet: Freeze-resistant engineered plastic
• Elastomers: Nitrile for durability and sealing
• Spring-loaded internal components for consistent operation
• Serviceable in line with access from unit top

Performance & Functionality:

• Backsiphonage protection via spring-loaded check and air inlet valves
• Check closes at zero flow; air inlet opens below 1 PSI
• Supports continuous pressure operation up to 150 PSI
• Minimum installation height: 12" above highest downstream piping
• Rated operating temperature: 32°F to 140°F (0°C to 60°C)

Ease of Installation & Use:

• Vertical installation with flow direction marking
• Quarter-turn ball valves reduce manual effort
• Test ports centrally located for easy access
• Top-entry bonnet simplifies service and inspection
• Optional union-end valves for tool-free removal

Technical Specifications:

• Operating Pressure Range: 0–150 PSI
• Flow Rate: Up to 80 GPM (1-1/4" model)
• Temperature Range: 32°F to 140°F (0°C to 60°C)
• Size: 1-1/4"
• Thread Type: NPT ANSI/ASME B1.20.1
• Pressure Relief: Spring-loaded poppet with air inlet
• Body Diameter: 7.25" height, 8" length (approximate)
• UV-Resistance: Bonnet and body suitable for outdoor use
• Pop-Up Height: N/A (non-sprinkler device)
• Electrical Inputs/Outputs: Freeze sensor requires separate activation kit

Installation & Application:

• Use in irrigation systems, laboratories, pools, laundries, and cooling towers
• Vertical orientation with 12" minimum height above downstream outlet
• Not suitable for potable water applications
• Install in accessible areas for annual testing and service
• Spillage may occur during operation—install where drainage is permitted

Compatibility & Optional Accessories:

• Freeze Sensor Kit (FP-FBF-WiFi/BMS/IMS-FZ) sold separately
• Compatible with SentryPlus Alert® monitoring systems
• Includes mounting clips and Wi-Fi capable alert system for freeze detection
• Available Union End Ball Valves (Model 765U)