Backflow prevention assembly regional design standards and test requirements

The following regional installation standards for backflow assemblies are available to help you design and install required equipment. The printer-friendly PDFs are provided for your convenience by the Eugene Water & Electric Board, Springfield Utility Board, Rainbow Water District, and City of Eugene Planning and Development department.

Small assemblies (0.5 inch to 2.0 inches)
Large assemblies (2.5 inches and larger)
Assemblies for fire lines
EWEB's Tester Handbook

Read EWEB's Tester Handbook.


For more information about the backflow prevention assembly regional design standards, call (541) 685-7000 and press 5, 1, 1 to speak with EWEB's Backflow and Cross-Connection Program.