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Can I install a backflow-prevention assembly? (flowchart)

This is the explanation of a flowchart that identifies who is authorized to install backflow-prevention assemblies. This flowchart is published as Appendix A of RG-478.

Yes, if you are any one of these:

  • A licensed plumber working under a master plumber’s license, and the assembly is not on a fire-suppression system.
  • A licensed irrigator, and the assembly is on an irrigation system.
  • A water operator, and the assembly is on the water-distribution system and not on an irrigation system.
  • A licensed plumber working for a fireline-contracting company insured and regulated by Texas State Board of Insurance, and the assembly is on a fireline.
  • Employed as maintenance personnel for the property, the assembly is replacement and not part of the fire-suppression system, and no plumbing permit is required. (If a plumbing permit is required, the unit must be installed by a licensed plumber working under a responsible master plumber.)
  • A licensed water-treatment specialist and the assembly is on equipment for water treatment.
  • A homeowner, the assembly is on your homestead, and you have obtained a homeowner’s permit (if required).

Otherwise, you may not. These guidelines are based on the Texas Plumbing License Law (8 TAC 1301).