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Commercial Backflow
Professional installation of backflow preventers for commercial properties.
Protect Your Water Supply
Backflow Preventer Installation in Vancouver WA
New irrigation system, utility compliance notice, or replacing a failed device — H2O Plumbing installs the right backflow preventer for your property. Serving all of Clark and Cowlitz County.
Serving Vancouver, Battle Ground, Ridgefield, Camas, Washougal, Longview, Woodland, and nearby communities with same-day availability in many areas.
Licensed & Insured
Family Owned and Operated
Same-Day Service
Secure Your Water
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Quick, professional backflow installation
Note on annual testing: Annual backflow testing requires a Washington State certified backflow assembly tester — a separate certification we don't currently hold. We install and replace devices. For annual testing, contact your water utility for a certified tester referral.
Serving Local Cities
Backflow Installation Services
New Installation
Installing an irrigation system or adding a new water connection? We install the correct backflow device for your hazard level and pipe configuration.
- Irrigation system backflow
- New service connection
- Commercial build-out
Device Replacement
Older device that's beyond repair or the wrong type for your application? We replace it with a properly sized unit that meets current code.
- Failed or aged device
- Upgrade to correct type
- Post-renovation compliance
Utility Compliance
Got a notice from your water utility requiring a backflow device? We handle the installation so your property meets their requirement.
- Clark County PUD notices
- City of Vancouver requirements
- Commercial compliance
Device Types We Install
The right device depends on your hazard level and connection type. We size and select the correct unit.
RPZ / Reduced Pressure Zone
Most protective — required for high-risk connections
High-hazard commercial, irrigation, fire suppression
Double Check Valve (DCVA)
Common for landscape irrigation systems
Low-hazard commercial, residential irrigation
Pressure Vacuum Breaker (PVB)
Must be installed above highest sprinkler head
Residential irrigation above ground
Atmospheric Vacuum Breaker (AVB)
Hose bibbs, individual fixture protection
Low-hazard residential fixtures
Backflow Prevention FAQs
What is a backflow preventer and why do I need one?
A backflow preventer stops water from flowing in reverse — from your property back into the public water supply. Without one, contaminants like fertilizers, chemicals, or sewage could be pulled into the drinking water system. Washington State requires backflow prevention devices on irrigation systems and many commercial connections.
Do I need a backflow preventer for my irrigation system?
In most cases yes. Any irrigation system connected to potable water in Washington State requires a backflow prevention device. If you're installing a new irrigation system or your utility has flagged your property, we can install the right device for your connection type.
What types of backflow preventers do you install?
We install Reduced Pressure Zone (RPZ/RP) assemblies, Double Check Valve Assemblies (DCVA), Pressure Vacuum Breakers (PVB), and Atmospheric Vacuum Breakers (AVB). The right device depends on your hazard level and connection type — we size and select the correct unit for your situation.
Do you handle annual backflow testing?
Annual testing requires a Washington State certified backflow assembly tester — that's a separate certification we don't currently hold. We install and replace devices. For annual testing, your water utility can refer you to a certified tester in Clark County.
My utility is requiring me to install a backflow preventer — can you help?
Yes — this is one of the most common reasons people call us. If your utility has sent a notice requiring a backflow device, we can install the correct type and size to satisfy compliance. We work with the utility requirements so your installation passes.
How much does backflow preventer installation cost?
Pricing depends on the device type and your property setup. We give you a written quote before any work starts — call us for a free estimate.
Need a Backflow Device Installed?
Serving Vancouver, Battle Ground, Camas, Washougal, Ridgefield, Longview, and all of Clark County.
Recent Field Work in Clark County
Real H2O Plumbing installations and repairs across Southwest Washington.
Residential Systems
Protecting your home drinking water from cross-contamination.
Annual Testing
Certified testing and maintenance for complex commercial systems.