2 Products

Series LF909 Small prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage or backpressure where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure. Small diameter 3/4 to 2 inch sizes.

Series LF909 for small diameter assemblies has a compact modular design that facilitates easy maintenance for in-line repairs. It can be installed horizontal or vertical without the need of any special tools.


  • Lead free construction
  • Exclusive relief valve design provides maximum capacity during emergency conditions
  • No special tools required for servicing
  • Compact modular design facilitates easy maintenance for in-line repairs

2 Products

3/4 LF909-QT
3/4" LF909HW QT