Backflow Prevention & Avoiding Cross-Connections

  1. Cross-Connection
  2. Backflow
  3. Definitions

A cross connection is an arrangement of piping or more commonly a garden hose between the potable water or drinking water supply and any other substances. Examples of a cross connection include:

  • A garden hose placed into a spa, swimming pool, or pond.
  • Use of a device to apply pesticides or fertilizer to a lawn via a garden hose.
  • A heat recovery unit or heat exchange unit.
  • Attaching a well to a dwelling that is serviced by a potable water system.
  • Use of a hose to unclog a drain or sewer system.

Reporting Cross-Connections

Anyone observing a Cross Connection or a potential Cross-Connection should inform their local office.

Fixtures That Have a Potential for Cross Connection

Fixtures that have a potential for cross connection include

  • Agriculture Mixing Tanks
  • Auxiliary Water Supply
  • Dishwashers
  • Garden Hose
  • Ornamental Ponds
  • Photographic Developers
  • Sinks
  • Solar Energy Systems
  • Spas
  • Sprinklers
  • Swimming Pools
  • Toilet Flush Valves
  • Water Softeners
  • Watering Troughs