I am installing an underground sprinkler system utilizing only City potable water. How do I properly connect my underground sprinkler system to the City's potable water?

First, obtain an Underground Sprinkler Installation Permit from our Cross Connection Specialist.

You will need to properly install a backflow assembly approved by the Department of Health. Below you will find several installation diagrams. Each backflow assembly has specific installation requirements which may not work in all situations. Contact the City's Cross Connection Specialist, 509-967-5434, for assistance.

Additional Resources

Once your device has been installed do not backfill. You will need to contact the City's Cross Connection Specialist, 509-967-5434, to have it inspected.

You are required to have your backflow assembly tested annually. The City will send a reminder letter 30 days prior to your annual test due date. Please contact one of the Certified Backflow Testers to have your test completed.

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1. What is a cross-connection?
2. I received a letter from the City notifying me my backflow assembly needs to be tested. Is there a list of certified testers?
3. What is considered a potential hazard?
4. I want to connect my underground irrigation system to the City potable water in addition to the CID or the KID, what is the proper way to connect to both systems?
5. I am installing an underground sprinkler system utilizing only City potable water. How do I properly connect my underground sprinkler system to the City's potable water?
6. I am going to disconnect my underground sprinkler system from the City potable water system. How do I properly disconnect from the City's potable water system?
7. What happens if I do not have my backflow device tested?