Backflow testing is one of the few skilled trades a single licensed operator can launch from a pickup truck for under $5,000 and grow to six figures inside two years. The work is recurring, the margins are strong, and demand is enforced by every water utility in the country. This guide covers the startup math, the legal and equipment essentials, and a 90-day plan to fill your first route.
Startup Cost Breakdown
| Item | Low | Typical |
|---|---|---|
| Certification + exam | $400 | $700 |
| Test gauge (calibrated) | $500 | $900 |
| Hoses, fittings, repair kits | $200 | $400 |
| General liability insurance | $500/yr | $900/yr |
| LLC formation + business license | $150 | $400 |
| Software (FlowCert) | $0 + per-report | $0 to start |
| Total to launch | ~$1,750 | ~$3,300 |
Legal Setup
- LLC or sole prop — LLC recommended for liability separation
- EIN — Free from the IRS in 5 minutes
- State tax registration — Sales tax may apply on labor in some states
- General liability + tools coverage — Minimum $1M aggregate
- Bonding — Required by some utilities for the approved tester list
Pricing Your First Quotes
New testers undercharge and burn out. Use this floor:
- PVB: $75 minimum
- DCVA: $95 minimum
- RPZ: $125 minimum
- Trip charge for <3 devices: $35-$50
Full pricing strategy in our pricing services guide.
Your First 90 Days
Days 1-15: Foundation
- Complete certification + register with 3-5 local water utilities
- Set up FlowCert free account for report submission
- Order business cards and vehicle magnet
Days 16-45: First Customers
- Cold-call 10 property management companies per week
- Partner with 2-3 irrigation companies for referrals
- Pull the city's expired-test list (often public) and direct-mail owners
Days 46-90: Route Density
- Group jobs by zip code to cut drive time
- Set 11-month auto-reminders so renewals come back to you
- Add a second gauge if booking 15+ tests/week
Year-One Revenue Math
10 tests/week × $110 average × 50 weeks = $55,000. Aggressive solo operators routinely hit $80-$120K by adding repairs and small installations.
Frequently Asked Questions
Do I need a plumbing license?
Depends on the state. See our multi-state licensing guide.
Should I lease or buy a truck?
Use whatever runs reliably for the first year. Buy purpose-built only after you know your route patterns.
How do I find my first 10 customers?
Approved-tester list registration + 3 property management cold calls daily for 30 days nearly always produces a full pipeline. See our marketing guide.