Skip to Main Content

Watts 1 1/2 LF909M1-QT-S-FS Lead Free Bronze Body Backflow Preventer - 1.5 Inch NPT, 175 PSI, Strainer

Mfr. Model #:
1 1/2 LF909M1-QT-S-FS (F122766)
KR Part #:
45.00 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 1.5-inch NPT, handles a maximum pressure of 175 PSI. Includes strainer to prevent particulates entering preventer.

Product Description

1 1/2" Bronze Backflow Preventer

The Watts LF909QTS (0122766) 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 1-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: 1.5 IN
  • Inlet Connection Size-Metric: 38 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: 1.5 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: 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
  • Strainer to prevent particulates entering preventer

Product Reviews

Frequently Asked Questions