Dye Testing Procedures

Dye Testing
Personnel Requirements

Customer or customer’s representative (usually a plumber or irrigation specialist) with knowledge of the site to operate the irrigation system and to go through the buildings looking for cross-connections while the dye test is being performed.
City Water personnel to set up and conduct dye test, monitor the irrigation system, record information, and to accompany customer or customer’s representative into the buildings. 

Prior to the Dye Test

The City Water Inspector will:
  • Notify the customer of inspection date.
  • Verify:
    • Customer information
    • Reclaimed meter number and lock
    • User Agreement has been signed
    • On-site contact information is available.

Site Inspection

The City Water Inspector will:
  • Verify installation of backflow prevention assembly on potable services.
  • Review submitted drawing and test procedure. 
  • Using potable water check irrigation system for ponding, runoff, and overspray onto areas such as eating areas, drinking fountains and parking lots.
  • Ensure all irrigation hose bibs have been removed.
  • Verify meter and box are painted purple and meter is tagged.

Preparation for the Dye Test

The City Water Inspector will:
  • Identify the connection to the reclaimed system and disconnection from the potable Water.

The Dye Test

  • A hose from the fire hydrant is connected to the dye inspection spool. See diagram of spool injection assembly.
  • Water is then turned on to activate the spool connected into the irrigation system for testing.
  • Dye is introduced in the spool for testing.
  • Check each sprinkler head of the irrigation system until the dye has come out of each one.
  • During the dye test, check all internal and external potable outlets to verify that no dye is coming from the outlet and that there is no visible water pressure.
  • Irrigation system is then taken to 5 to 10 psig above potable water for at least 24 hours or other approved method by the city.

Test Completion

  • After 24 hours or approved method, if no evidence of potable cross-connections is found during the testing of all irrigation equipment, the site is declared free of cross-connections.
  • The spool assembly is removed from the irrigation system.
  • The backflow assembly and meter may be installed.
  • The City Water inspector authorizes that the reclaimed water valve maybe opened to irrigation system.