Before a Boise irrigation contractor opens the spring valves, identify where the water comes from. A drinking-water connection and a separate irrigation supply require different questions, even when the sprinkler heads look identical. Make the source and backflow arrangement part of the service order. A successful watering cycle demonstrates that water flows; it does not establish that the supply is protected.
Identify the Supply Before Touching Connections
Boise’s municipal-irrigation code distinguishes potable and nonpotable supplies and addresses their interconnection. Confirm whether the property actually uses that municipal irrigation system, another irrigation district, a well or a drinking-water service. Do not apply the municipal program to every Boise-address property.
Find the water bills, shutoff locations and any prior assembly test report. Ask the contractor to label the source on the irrigation drawing. If two supplies appear to be connected, have the responsible water provider and qualified plumbing professional assess the arrangement before using it.
Match the Assembly to the Provider’s Program
Idaho DEQ explains that property owners must install and test backflow assemblies in accordance with their water purveyor’s cross-connection program. Its drinking-water FAQ also identifies inspection and testing by a licensed tester. Ask the provider which assembly and reporting process apply to this connection.
Record the assembly type, location and identification number where available. Ask who will conduct the test, where the result goes and what happens if the assembly fails. A general sprinkler-startup invoice should not be mistaken for a completed backflow test report.
Inspect Winter Damage and Access
Before programming irrigation, have the contractor check visible piping, valves, boxes and the assembly for damage or leakage. Ask how repairs affect any required retest and whether replacement work needs separate trade authorization or inspection. Keep access clear so testing does not require dismantling landscaping.
Show the provider areas where irrigation water pools or where a buried valve has become difficult to reach. Price those corrections separately from routine startup. If a contractor proposes changing the assembly location, obtain the water provider’s direction before treating that move as a simple landscape adjustment.
Leave a Record for the Next Season
The handoff should identify the water source, shutoffs, assembly, test result and reporting destination. Ask for a demonstration of normal operation and the conditions under which you should stop using the system and call for service. Save the information with winterization records rather than relying on the technician who happened to visit last year.
After startup, walk the zones with the irrigation contractor to check leaks and coverage. Keep controller programming separate from the protection-system record: the watering schedule may change often, while the provider still needs a consistent history of assembly tests and repairs.
- Which water provider owns the cross-connection program?
- Who performs the test and submits the result?
- Does a repair or relocation require retesting or another approval?
Questions Homeowners Ask
Does every Boise property use city irrigation?
No assumption should be made from the address alone. Confirm the actual supplier and any separate drinking-water connection.
Is startup the same as backflow testing?
No. Ask for the assembly test record and confirmation that it reached the required provider; running sprinklers is a different task.
Can a failed assembly stay in use until the next visit?
Ask the responsible provider and qualified tester for the required response. Do not bypass protection to keep the irrigation running.
Sources And Local Resources
Official sources checked October 17, 2026. Confirm current requirements with the authority responsible for your property.
- Idaho DEQ Drinking Water FAQsWater-purveyor cross-connection programs, property-owner responsibilities and licensed testing.
- Boise Municipal Irrigation TermsMunicipal irrigation context and restrictions on potable/nonpotable interconnection.
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