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AAA Organized Plumbing provides certified backflow testing, installation, and repair services that protect your drinking water supply throughout Mendocino, Sonoma, Lake, and Napa Counties. Backflow prevention devices keep contaminated water from reversing direction and entering the potable water system – a critical safety measure required by California plumbing codes and local water districts. Annual testing is mandatory for most commercial properties and for residential properties with irrigation systems, fire sprinkler connections, or any cross-connection to a non-potable source. Our certified backflow testers perform inspections, file required documentation with your water district, and repair or replace assemblies that fail testing. Whether you need annual certification for your Ukiah business, a new backflow preventer installed at your Napa vineyard, or repair on a failed assembly in Healdsburg, our team keeps you compliant and your water safe. Call (707) 200-3159 to schedule your backflow test.
California water districts require annual testing of all backflow prevention assemblies to verify they’re functioning correctly and protecting the public water supply.
Our certified testers perform the standardized test procedure on reduced pressure zone (RPZ) assemblies, double check valve assemblies (DCVA), and pressure vacuum breaker (PVB) devices. The test evaluates each check valve and relief valve for proper operation within required pressure differential tolerances. We submit passing test reports directly to your water district and provide you with documentation for your records. Most tests take 15–30 minutes per assembly.
When a backflow assembly fails its annual test, repair is required before recertification. Common failure causes include worn check valve seals, stuck relief valves, fouled seats from sediment or mineral deposits, and spring fatigue. We carry common repair kits for major manufacturers including Watts, Wilkins, and Febco, and can often complete repairs and retest during the same visit.
Water districts periodically require property owners to identify and document all cross-connections on their property – points where the potable water system connects to a potential contamination source. We perform cross-connection surveys that identify every connection requiring backflow protection, assess whether existing devices meet current code requirements, and recommend upgrades where needed.
New backflow assemblies are required for various applications to comply with California cross-connection control regulations.
Landscape irrigation systems are among the most common residential applications requiring backflow protection. Fertilizers, pesticides, and bacteria in irrigation water must be prevented from siphoning back into the household drinking water supply during pressure drops. We install pressure vacuum breakers (PVBs) for standard residential systems and RPZ assemblies where local codes or system configurations require higher-level protection.
Commercial properties including restaurants, wineries, dental offices, medical facilities, and auto shops in communities throughout Sonoma and Napa Counties require RPZ assemblies at the water service entrance and may need additional devices at specific equipment connections. We size and install assemblies based on line size, flow demand, and the hazard classification of each cross-connection.
Fire sprinkler systems create a cross-connection between the potable water supply and the stagnant water standing in sprinkler piping. Local fire codes and water districts require dedicated backflow assemblies on fire sprinkler connections. We install and test these assemblies in coordination with fire protection contractors.
Backflow service costs depend on the type and number of assemblies, whether repair is needed, and installation complexity for new devices. Here are general ranges:
Annual Backflow Test (per assembly): $75–$150
Backflow Assembly Repair and Retest: $150–$400 depending on parts needed
PVB Installation (irrigation system): $300–$600 including device and labor
RPZ Assembly Installation (commercial water service): $800–$2,500 depending on line size
DCVA Installation: $500–$1,200 depending on line size and location
Cross-Connection Survey: $150–$350 depending on property complexity
Cost factors specific to Northern California include:
Water districts across Northern California require all commercial properties to maintain certified backflow protection on their water service. Restaurants, offices, medical facilities, and retail shops in Ukiah, Napa, and throughout the region face annual testing requirements and potential fines for non-compliance. We manage annual testing schedules for commercial clients and provide advance notification when testing is due.
Any home with an in-ground irrigation system connected to the domestic water supply requires backflow protection. Properties in Cloverdale, Windsor, and Geyserville with large landscaped lots are common candidates. We install the appropriate device based on your local water district’s requirements and perform annual testing to maintain compliance.
Wineries, vineyards, farms, and agricultural processing facilities throughout the Napa and Sonoma Valley have complex water systems with multiple cross-connection points including chemical mixing stations, equipment wash-down systems, and irrigation. We design and install comprehensive backflow protection programs tailored to agricultural operations.
Licensed California Plumbing Contractor (LIC. 1118193): Fully licensed and insured for all residential and commercial plumbing work throughout Northern California.
Experienced Technicians
Our team brings years of hands-on plumbing experience to every job, ensuring repairs and installations are done correctly the first time.
Same-Day and Emergency Service
Plumbing problems don’t wait for business hours. We maintain emergency response capabilities across Mendocino, Sonoma, Lake, and Napa Counties.
Transparent, Written Estimates
We provide detailed written estimates before beginning any work – no hidden fees or surprise charges after the job is done.
Code-Compliant Work
Every job meets current California Plumbing Code requirements. We pull permits where required and ensure your work passes inspection.
Step 1
Schedule Testing
We coordinate with your water district’s testing deadline and schedule a convenient time for the inspection.
Step 2
Assembly Inspection
Our certified tester visually inspects the backflow assembly for damage, corrosion, or leaks before connecting test equipment.
Step 3
Standardized Test Procedure
We attach calibrated test gauges and perform the test protocol specific to your assembly type, checking each check valve and relief valve independently.
Step 4
Pass/Fail Determinatio
If the assembly passes, we complete the test report. If it fails, we diagnose the specific component failure and provide a repair estimate.
Step 5
Repair and Retest (if needed)
We replace failed components using manufacturer-specified repair kits and perform the complete test again to verify passing results.
Step 6
Documentation and Filing
We submit the completed test report to your water district electronically and provide you with a copy for your records.
AAA Organized Plumbing offers comprehensive plumbing services that complement our work:
We clear tough clogs and blockages from sinks, tubs, showers, and drains. Our equipment restores proper flow and helps prevent future plumbing issues.
We clear tough clogs and blockages from sinks, tubs, showers, and drains. Our equipment restores proper flow and helps prevent future plumbing issues.
Plumbing issues can’t always wait. We’re available 24/7 for burst pipes, sewer blockages, and water heater failures.
Plumbing issues can’t always wait. We’re available 24/7 for burst pipes, sewer blockages, and water heater failures.
Leaky or outdated faucets? We install modern fixtures and repair existing ones to stop water waste and improve function.
Leaky or outdated faucets? We install modern fixtures and repair existing ones to stop water waste and improve function.
Hidden leaks can lead to major damage. We locate and repair leaks quickly to protect your property and reduce utility bills.
Hidden leaks can lead to major damage. We locate and repair leaks quickly to protect your property and reduce utility bills.
Our team handles repairs and replacements for water transfer systems, including booster pumps and water circulation systems.
Our team handles repairs and replacements for water transfer systems, including booster pumps and water circulation systems.
When repairs aren’t enough, we provide full replacements using efficient and minimally invasive techniques.
When repairs aren’t enough, we provide full replacements using efficient and minimally invasive techniques.
We repair damaged sink basins, fix slow drains, and replace sinks during remodels or upgrades.
We repair damaged sink basins, fix slow drains, and replace sinks during remodels or upgrades.
We provide complete services for tank and tankless water heaters, from inspection to replacement.
We provide complete services for tank and tankless water heaters, from inspection to replacement.
AAA Organized Plumbing provides backflow testing & prevention throughout Mendocino, Sonoma, Lake, and Napa Counties from our Ukiah, CA headquarters:
Boonville, CA
Calpella, CA
Cloverdale, CA
Covelo, CA
Fort Bragg, CA
Geyserville, CA
Healdsburg, CA
Hopland, CA
Lakeport, CA
Laytonville, CA
Mendocino, CA
Nice, CA
Philo, CA
Potter Valley, CA
Redwood Valley, CA
Sea Ranch, CA
Talmage, CA
Ukiah, CA
Willits, CA
Windsor, CA
Napa, CA
American Canyon, CA
Calistoga, CA
St. Helena, CA
Yountville, CA
A backflow preventer is a mechanical device installed on your water line that prevents water from flowing backward into the public water supply. Backflow can occur when water pressure drops – such as during a water main break or fire hydrant use – potentially pulling contaminated water from irrigation systems, boilers, or chemical equipment into the drinking water supply. California plumbing code requires backflow prevention on any cross-connection to protect public health.
California requires annual testing of all testable backflow prevention assemblies (RPZ, DCVA, PVB). Your local water district sends notification when testing is due. Failure to test within the required timeframe can result in fines or water service disconnection, depending on your district’s enforcement policy.
If your assembly fails testing, it must be repaired and retested before certification can be issued. Most failures involve worn rubber check valve seals or fouled valve seats – components that we carry and can replace on-site. After repair, we perform the complete test procedure again. If the assembly passes retest, we file the passing report with your water district.
Residential properties with in-ground irrigation systems, fire sprinkler systems, swimming pool fill connections, or any connection to a non-potable water source are required to have backflow prevention and annual testing. Standard residential properties without these features typically have a simple hose bib vacuum breaker that doesn’t require annual testing.
No. California requires backflow testing to be performed by a certified backflow assembly tester. Testers must hold a valid certification from an approved testing organization and use calibrated test equipment. Our technicians maintain current certifications and calibrate gauges annually per industry standards.
A reduced pressure zone (RPZ) assembly provides the highest level of protection and is required for high-hazard connections where contamination could be harmful or lethal. A double check valve assembly (DCVA) provides protection for low-hazard connections. RPZ assemblies include a relief valve that discharges water if either check valve fails, providing a visible indication of malfunction. Your water district determines which type is required based on the hazard classification of each cross-connection.
