What Is Backflow Testing?
Backflow testing is the annual inspection and certification of a backflow prevention assembly — the device installed on your water line to prevent contaminated water from flowing back into the public water supply. California law requires this test to be performed by a certified backflow tester and the results reported to your water district.
At Ontario Backflow Tests, we perform certified backflow testing for all assembly types: double check valves (DCV), reduced pressure zone devices (RPZ), pressure vacuum breakers (PVB), and atmospheric vacuum breakers (AVB). We serve residential properties, commercial buildings, warehouses, irrigation systems, and industrial facilities.
After testing, we file your results directly with City of Ontario Utilities and all 12 water districts in our service area. You receive a copy for your records — no forms, no trips to the water department. If your device fails, we can repair and retest in the same visit.
Why It Matters
Backflow prevention is required by California law to protect the public water supply from contamination caused by cross-connections. Without an annual test and certification, your water district — typically City of Ontario Utilities — can issue a non-compliance notice and ultimately suspend your water service.
Ontario's dense commercial and warehouse corridor creates a particularly high risk environment for backflow incidents. Industrial water users, food processing operations, and large irrigation systems all require reliable, compliant backflow prevention. Missing your annual test isn't just a fine risk — it's a public health issue.
Our Testing Process
Call or submit a request online. We confirm a same-day or next available appointment at a time that works for you.
Our certified technician arrives at your property and locates your backflow prevention assembly.
We perform the required functional test using calibrated equipment. The entire process typically takes 30–60 minutes.
Test results are filed directly with City of Ontario Utilities or your local water district. You receive a copy for your records.
If your device fails, we repair or replace it on the same visit in most cases and retest immediately after.
Work From the Field
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Who Needs Backflow Testing?
- ✓ Warehouse and logistics facility operators
- ✓ Residential homeowners with irrigation systems
- ✓ HOA communities
- ✓ Restaurants and food processing businesses
- ✓ Commercial property managers
- ✓ Industrial facilities with process water connections
- ✓ Any property with a required backflow prevention assembly
Pricing depends on the type and size of your backflow prevention assembly, your location, and water district requirements. We provide upfront pricing before any work begins — no hidden fees, no surprises.
Call for a Free QuoteCities We Serve for Backflow Testing
Frequently Asked Questions
Schedule Backflow Testing in Ontario, CA Today
Available 24/7. Results reported directly to City of Ontario Utilities — no paperwork for you.
Precision-Calibrated
Testing Equipment
We use professional-grade differential pressure gauges — the same equipment used by municipal water utilities. Every instrument is factory-calibrated and traceable to NIST standards, so your test results hold up with any water district.