How Much Does Backflow Preventer Installation Cost?
Average cost: $300 | Range: $150 – $500
Average Cost
$300
Low End
$150
High End
$500
Time Required
1-2 hours
What Affects the Price?
Backflow preventers protect your drinking water from contamination. Many municipalities require annual testing, which adds an ongoing cost. Larger commercial-grade devices cost significantly more.
Key Cost Factors
- Device type
- Pipe size
- Permit and testing fees
- Installation location
DIY vs. Professional
DIY
This service requires a licensed plumber. DIY attempts risk additional damage or safety hazards.
Professional
Licensed plumbers ensure code compliance, warranties on work, and liability coverage.
Cost: $150 – $500
Cost by State (Sample)
| State | Low | High | Avg |
|---|---|---|---|
| Alabama | $132 | $440 | $264 |
| Alaska | $203 | $675 | $405 |
| Arizona | $146 | $485 | $291 |
| Arkansas | $128 | $425 | $255 |
| California | $218 | $725 | $435 |
| Colorado | $165 | $550 | $330 |
| Connecticut | $188 | $625 | $375 |
| Delaware | $162 | $540 | $324 |
| Florida | $153 | $510 | $306 |
| Georgia | $143 | $475 | $285 |
Frequently Asked Questions
Always Get 3 Quotes
Plumbing prices vary by 20–50% between contractors. Getting multiple quotes is the single best way to avoid overpaying.
How to Find a Good Plumber →Home Warranty Coverage
A home warranty may cover backflow preventer installation for a flat service fee instead of the full repair cost.
Compare Warranties