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CostBackflow TestingLicensed pro

How much does backflow testing cost in Virginia?

There is no set Virginia price for a backflow test. Testers set their own rates, and Chesterfield County says it does not set testing rates or collect any revenue from these tests. The price depends on how many assemblies you have and any repair or re-test. Get two or three written quotes, and ask what the fee includes.

Free to ask. Local shops send quotes, and you pay only when you book one.

By Kasra Taheri, Founder, LoclisPublished

Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.

This is a job for a licensed pro in Virginia

This page explains what the work involves, the permits, what a licensed pro does and what drives the cost. It does not give step-by-step instructions, because this work needs a licence, a permit or both, and doing it wrong can injure someone. Before you hire, check the licence on Virginia's DPOR record.

Backflow testing has no standard Virginia price. Chesterfield County states that it does not perform testing on these private backflow prevention devices, set testing rates or collect any revenue from these tests.[2] Each tester sets their own price, so this page explains what moves a quote and how to get a fair one.

What drives the price

How many assemblies you have. A house with a single sprinkler assembly is a small appointment. A property with a sprinkler assembly plus a second irrigation zone or a fire sprinkler system has several. Fairfax County will NOT accept partial or incomplete Backflow Assembly Test Reports,[1] and all Backflow Prevention Assemblies installed at the location are required to be tested, and passed, when due each year.[1] Ask for a per-assembly price so there are no surprises.

Whether it passes. A pass is the cheap day. If the assembly fails, it must be repaired or replaced, and re-tested before a Backflow Assembly Test Report can be submitted by the vendor.[1] That adds parts, labor and a second visit, and the second visit may or may not be in the original price. Ask whether the first re-test is included.

Repair or replacement. A fix can be as small as replacing internal parts, or as large as swapping the whole assembly. In Fairfax County, replacement needs a permit: you must obtain either a Commercial or Residential Plumbing Permit in all instances of installation, whether as new construction or replacement.[1] Your locality may differ, so the permit fee, if any, is a separate line on the quote.

Size and type. Larger or more complex assemblies take longer to test and repair. Your tester can tell you from a look at the device whether it is a pressure vacuum breaker or a reduced pressure assembly, and which parts are available.

Access and season. An assembly that is buried in a flooded valve box, hidden in shrubs or already winterized takes longer to reach. Testing in spring, when everyone books irrigation work, can also mean a wait.

Reporting. The result is not complete until it is filed. Test results must be recorded on an approved BFP Test Report form,[3] signed by the tester, and some localities want the tester to submit it to them. Ask whether filing is part of the fee.

Three backflow preventers inside green steel mesh cages beside a sidewalk and planting bed outside a building
Photo: Mds08011, CC BY 4.0, via Wikimedia Commons

Getting a fair quote

  1. Find out whether your locality keeps a tester list. Fairfax County's program tells owners to contract with a third party, and it is recommended you contact several from the list to obtain the best pricing.[1]
  2. Confirm each tester is certified. Chesterfield County requires that individuals who perform tests on backflow prevention assemblies must hold a valid Tradesman Certificate as a Backflow Prevention Device Worker issued by the Virginia Department of Professional and Occupational Regulation,[3] and you can look each one up on DPOR's License Lookup.[5]
  3. Ask for written quotes that name the number of assemblies, the test fee, whether filing the report is included, and the price of the first re-test.
  4. Ask what the repair price would be before a failed test happens, so a bad result is not a negotiating moment.
  5. Ask whether the tester can pair the test with spring start-up, since a single visit can save a trip charge.

The test is required at a regular interval, so cost it as a yearly line in the house budget. Chesterfield lists the rule for both assembly types in its irrigation guide: "Must be tested upon installation, after repair, when relocated, and annually as a minimum."[3] See what a backflow preventer is and how it is tested and whether Virginia requires annual testing.

When to call a licensed pro

For every test, repair and replacement. State law calls the certification program for backflow prevention device workers voluntary, so long as any requirements of the applicable local governing body's programs relating to backflow prevention device workers are met,[4] and your locality's program can still require a certified tester. Hire a certified tester when the test is due, when an assembly has been damaged, or when a report says it failed.

Read the permit and backflow rules for a lawn sprinkler system, browse irrigation answers or irrigation businesses, and describe your job to get quotes from licensed local pros.

Common questions

Is there a fixed price for backflow testing in Virginia?
No. Chesterfield County says it does not set testing rates or collect any revenue from these tests, so each tester sets the price. Compare written quotes.
Does my county charge a fee for the annual test?
It depends on the locality. Fairfax County says annual testing does not require a permit, but the tester must submit the report. Ask your building department or water utility whether it charges any filing fee.
What happens to the cost if my assembly fails?
Fairfax County says a failed assembly must be repaired or replaced and re-tested before the report can be accepted, so a failure adds repair or replacement and a second test to the price.
Do I pay again if I have two assemblies?
Usually the quote changes with the number of assemblies. Fairfax County will NOT accept partial test reports and requires all assemblies at a location to be tested, so ask for a per-assembly price in writing.
Can I save money by testing it myself?
No. Chesterfield County requires that individuals who test assemblies hold a Backflow Prevention Device Worker certificate from DPOR, and the test report must be signed by the tester.

Sources

  1. [1] Cross Connection Control and Backflow Prevention Program, Fairfax County Land Development Services. Checked October 27, 2026.
  2. [2] Meter Technology: Track Water Usage, Cross-Connection, Backflow, Chesterfield County Utilities Department. Checked October 27, 2026.
  3. [3] A Guide to Selecting, Installing and Maintaining Backflow Preventers in Residential Irrigation Systems, Chesterfield County Utilities Department. Checked October 27, 2026.
  4. [4] Va. Code § 54.1-1129, Tradesman license required, Code of Virginia, Virginia General Assembly. Checked October 27, 2026.
  5. [5] License Lookup, Virginia Department of Professional and Occupational Regulation. Checked October 27, 2026.

Want a pro to handle it?

Describe the job once. Licensed local businesses send quotes, and you pay only when you book one.