Backflow Testing & Repair
Your Drinking Water Depends on
a Functioning Backflow Preventer
Every pressurized irrigation system connected to a municipal water supply in Kootenai County is separated from your drinking water by a single mechanical device — the backflow preventer. When that device fails, fertilizer, pesticide residue, and soil bacteria can back-siphon directly into your home's supply line. Idaho code requires annual testing by a certified tester precisely because internal failure is invisible until something goes wrong.
LandscapePros coordinates RPZ and PVB testing for residential and commercial irrigation systems throughout Coeur d'Alene, Post Falls, Hayden, and throughout Kootenai and Bonner Counties. We manage the scheduling, documentation, and water district filings — and handle repair or assembly replacement on the spot when a tester documents a failure. One call covers the entire compliance cycle.
Four Reasons Not to Skip Annual Testing
Idaho Law — Not Optional
Idaho Plumbing Code and the rules of virtually every water purveyor in Kootenai County require annual testing of RPZ assemblies on pressurized irrigation systems connected to potable water. Skipped tests can result in service interruption notices from your water district and create liability if contamination is later traced to your system.
Protecting Your Drinking Water
A failed backflow preventer allows irrigation water — carrying dissolved fertilizer, pesticide residue, and soil bacteria — to back-siphon into your home's potable supply. RPZ and PVB devices are the only mechanical barrier between your irrigation system and the water your family drinks. A functional assembly is not a luxury.
Preventing Back-Siphonage Contamination
Back-siphonage occurs when a pressure drop on the supply side — from a main break, firefighting demand, or pump failure — creates negative pressure that pulls irrigation water backward through the connection point. Without a properly functioning backflow preventer, every herbicide and fertilizer application you make becomes a potential contamination source for your supply line.
Property Insurance Requirements
A growing number of property insurers in North Idaho are requiring documented annual backflow test certifications as a condition of coverage on properties with in-ground irrigation systems connected to municipal water. Having a clean, current test record on file with LP protects you when coverage questions arise at renewal.
"LP handles all our backflow testing and keeps us compliant with the county. Never had an issue with our water district."- Tom B., Coeur d'Alene
Backflow Testing, Repair & Documentation
Annual RPZ Assembly Testing
Idaho code requires that any Reduced Pressure Zone assembly connected to a pressurized irrigation system tied to a potable water supply be tested annually by a certified backflow tester. LandscapePros coordinates with state-certified testers to schedule your annual RPZ test, keeps your account on a reminder cycle, and ensures your water district receives the required documentation — so compliance never slips through the cracks.
PVB Inspection & Test
Pressure Vacuum Breakers are the most common backflow device on older North Idaho residential irrigation systems installed before RPZ requirements became standard in Kootenai County. LP inspects the air inlet valve, the check valve seat, and the bonnet seal for wear, debris fouling, or freeze damage — and performs or coordinates functional testing to confirm the PVB is still providing adequate protection.
Backflow Assembly Repair
When a tester documents failure — a leaking relief valve, a weeping check valve, or a cracked body — LP performs required repairs using manufacturer-approved rebuild kits for RPZ assemblies. Depending on the severity and age of the assembly, we either rebuild in-place with new check valve cartridges and seat discs, or replace the full assembly when internal deterioration makes a rebuild uneconomical.
Freeze Damage Assessment
North Idaho's October and November hard freezes are particularly unforgiving to backflow assemblies left unprotected. A single hard freeze can crack the body casting of an RPZ, destroy internal check valve seats, and cause the relief valve to stick open or fail closed. LP evaluates relief valve discharge, check valve seating, and body integrity after freeze events — before damage becomes a contamination risk or a failed annual test.
Assembly Location Upgrade
Some older installations have backflow assemblies sited in low spots that flood during spring snowmelt, against exterior walls with no freeze protection, or at elevations that no longer meet current code setback requirements from grade. When a location creates recurring failure or code non-compliance, LP relocates the assembly to a code-conforming, accessible, and protected position that extends assembly life and simplifies annual testing.
Test Report Documentation
After every test, LP provides the property owner with a copy of the completed test certification form — including pass/fail result, tester license number, and test date. For systems where the water district requires direct reporting, LP files the documentation on your behalf. We maintain records for every property we service so you have a verifiable compliance history at the time of sale or insurance audit.
Backflow Work Across Kootenai County
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