Freeze Protection for Above-Ground Backflow Preventers

Above-ground backflow preventers are subject to freezing during continuous temperatures below 32 degrees. Here are a few things you can do to protect them from damage:

RPZ and PVB assemblies have an isolation valve before the assembly. Locate this valve and turn it off.

  • Take the caps off of the test cocks and open them. This will drain water out of the assembly.
  • Insulate piping and cover entire assembly.

Some methods of insulation are special pouches which can be purchased from irrigation supply companies or wrapping old newspaper around piping and securing with tape. Plastic covers can also be purchased from irrigation supply companies, or a plastic trash can will work, as well.

If you have any questions, please contact Robert Brown at 817.249.1250.