Irrigation System Maintenance

IN THE SPRING:

Spring is the time to check your irrigation system. Look for leaks drips and other issues. 

If you have a backflow device (required under city code for sprinkler systems) now is the time to have it tested. (click here for more information)

Prevention now will keep your system operating efficiently and save water. 

• Close all manual drains (they were probably left open when sprinkler system was drained last fall).
• Slowly open the main valve, allowing the piping between it and the backflow prevention device to fill with water.
• Pressurize the mainline between the backflow device and the control valves.
  • Have one of the control valves open while you do this, so air trapped in the piping can escape through the sprinkler heads.

• Have the backflow prevention device tested by a state-certified tester.  Contact Public Works (503.537.1289) for assistance.  
• Run the entire sprinkler system, one zone at a time. As you do this, check the following:
• Signs of leaks, damage to sprinkler heads or pipe which occurred over the winter. Repair and replace as needed.
• Spray patterns. Adjust your sprinkler heads so they water your landscape.
  • Sidewalks dont get thirsty. Make sure the spray isn’t blocked by plants.
• Clean clogged nozzles and sprinkler heads

IN THE FALL:

Winterize your irrigation system:

1. Look for perpetual damp spots in your landscape as these might indicate a leak or broken line that will have to be fixed.
2. Get your backflow device checked. This is required each year by city code and state statute.
3. Winterize - empty any water and turning it off for the season (this includes drip systems too!)   
4. Insulate outdoor pipes.
5. Empty and disconnect your garden hoses from outdoor faucets.
6. Clear debris from your gutters and downspouts so overflow from storms doesn't flood your lawn.

Source: conserveh2o.org