A standard backflow test in the Denver metro usually runs about $90 to $125 per assembly. New Singer Plumbing Co. customers pay $95 per device for their first test.
What Denver-area testers charge
We looked at prices published by four Denver-metro backflow testers in October 2026:
| Item | Published range |
|---|---|
| Standard test (about 1/2" to 3" assemblies) | $88 – $125 per device, averaging about $112 |
| Larger assemblies (4" and up) | $115 – $175 per device |
| Additional device at the same property | $50 – $115, where listed |
| Trip fee within the service area | About $10, where listed |
| Mileage outside the service area | About $1 per mile |
| Repair labor | About $100 an hour plus parts, where listed |
Ranges come from prices those testers posted on their own websites in October 2026. Prices change; always get the number before the work.
What changes the price
- Assembly type and size. A residential PVB is quick. A large RPZ on a commercial building takes longer.
- Access. An assembly in a below-ground vault or a confined space takes extra time and equipment.
- Whether the water is on. A sprinkler system that's still winterized has to be turned on first. Doing the spring startup and the test in one visit saves a trip.
- How many assemblies. Multiple devices at one property, or a portfolio of properties, usually costs less per device.
- Filing fees. Some providers charge to file the report. Broomfield's BSI Online notice lists $14.95 per report, and Thornton says BSI charges its current price per report.
- A failed test. Cleaning or rebuilding a check valve or relief valve is a repair, plus a retest.
The cost of skipping it
The test is the cheap part. Aurora Water adds a $1,000 civil penalty to the water bill once a test is 30 days past due, and $2,000 at 60 days. Denver Water charges a $250 non-refundable penalty after three unanswered notices. Most providers can suspend water service for an assembly that's never tested. Rules by provider →
Our pricing
- First test $95 per device for new customers
- The report is filed with your water provider
- Failed assembly? You get the repair price before any work starts
- Property managers and HOAs can get one quote for every assembly on the list
Book a backflow test → or call (720) 818-5569.