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Watts 3/4 LF909-QT-FS Lead Free Bronze Body Backflow Preventer - 3/4 Inch NPT, 175 PSI, no Strainer

Mfr. Model #:
3/4 LF909-QT-FS (F391008)
KR Part #:
16.00 lbs
Usually Ships in 2 Weeks
Now Only!

Backflow preventer used to prevent polluted water from entering a potable water supply or injected chemicals from flowing back into a pump. Connections measure 3/4-inch NPT, handles a maximum pressure of 175 PSI.
Note: Does not include strainer.


Product Description

3/4" Bronze Backflow Preventer - No Strainer

The Watts 3/4 LF909-QT-FS is a backpressure and backsiphonage preventer for applications where polluted water needs to be prevented from entering a potable water supply or where chemicals should not flow back into a pump. Equipped with an inlet and outlet with 3/4-inch NPT connections. Body is constructed with lead-free bronze to comply with national plumbing codes and water authority requirements when needed. Features quarter turn ball valve shutoffs with tee handles. 


  • Backflow Preventer Type: Reduced Pressure Zone Assembly
  • Body Finish: Cast Bronze
  • Body Material: Lead Free Bronze
  • Body Pattern: Inline
  • Brand: Watts
  • Buy American Act Compliant: YES
  • Bypass: No
  • Cap And Tether: No
  • Disc Material: Silicone
  • Elbow Fitting: No
  • Hazard Protection Level: Health Hazard
  • Hot And Harsh Water: No
  • Hydrant Connection: No
  • Inlet Connection Size: 3/4 IN
  • Inlet Connection Size-Metric: 19 MM
  • Inlet Connection Type: Female Threaded
  • Inlet Shutoff Valve Type: Quarter Turn Ball Valve
  • Inlet Thread Type: NPT
  • Lead Free: YES
  • Maximum Temperature-Fahrenheit: 140
  • Maximum Working Pressure-BAR: 12.10
  • Maximum Working Pressure-PSI: 175
  • Meter Type: No Meter
  • Minimum Temperature - Celsius: 0.50
  • Minimum Temperature-Fahrenheit: 33
  • Outlet Connection Size: 3/4 IN
  • Outlet Connection Type: Female Threaded
  • Outlet Shutoff Valve Type: Quarter Turn Ball Valve
  • Outlet Thread Type: NPT
  • Polymer Coating: No
  • Pressure Operation: Continuous
  • Protection Type: Backpressure and Backsiphonage
  • Seat Material: Engineered Plastic
  • Series: LF909 Small
  • Strainer not included


  • Quarter turn full port resilient seated ball valve shutoffs
  • Captured springs for safe maintenance
  • Single access cover and modular check construction for the ease of maintenance
  • NPT inlet and outlet connections
  • Large body passages provide a low pressure drop
  • Test cocks are screwdriver slotted
  • Internal relief valve for reduced installation clearances
  • Replaceable seats for an economical repair
  • Lead-free bronze body construction for durability

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