Backflow Preventer Repair & Testing in Danville, VA

A backflow preventer helps keep contaminated water from reversing direction and entering a clean drinking-water supply. Changes in water pressure can potentially pull irrigation water, chemicals, sewage, or other contaminants backward through a cross-connection. Pro-Flo Plumbing provides backflow preventer testing, repair, and replacement in Danville, VA, for commercial properties, irrigation systems, fire-protection connections, multifamily buildings, and other systems where approved backflow protection is required. Because a failing assembly may not produce obvious symptoms, scheduled testing is an important part of protecting the property and the public water system.

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Protection for the Drinking-Water Supply

Under normal conditions, water travels from the public main into a building. Backpressure or backsiphonage can reverse that flow. This may happen because of a water-main break, sudden pressure loss, pump operation, or pressure created by equipment inside the property.

A properly selected backflow preventer acts as a barrier between the potable water supply and potential contamination sources.

Danville and Virginia Requirements

Backflow protection is not required in exactly the same form for every property. The appropriate device depends on the type of cross-connection and the level of potential hazard.

Virginia regulations require approved backflow protection where certain cross-connections exist. Commercial plumbing, irrigation, fire-sprinkler systems, food-service equipment, and other applications may require a testable assembly. Local officials or the water provider may also require installation, testing records, permits, or inspections.

Testing and Replacement Schedules

Many testable backflow assemblies must be tested when first installed, after repairs or relocation, and at least once each year. Testing should be completed by a properly certified backflow prevention device worker.

A preventer does not always need replacement simply because it fails a test. Worn seals, springs, check valves, and internal components may be repairable. Replacement may be recommended when the assembly is heavily corroded, cracked by freezing, repeatedly fails testing, or no longer has available repair parts.

Signs of Backflow Preventer Failure

Visible leaking, continuous discharge from a relief valve, reduced water pressure, unusual noises, and corrosion around the assembly may indicate a problem. Discolored water, changes in taste or odor, and unexplained pressure fluctuations also deserve attention.

However, some failures remain hidden until the assembly is professionally tested. Passing an annual test provides greater confidence that the internal checks are operating correctly.

Real reviews

Danville Neighbors on Our Backflow Work

Sample reviews shown

patricia lattimer

4 weeks ago

Nashzee Watkins

4 weeks ago

Pablo Anthony

4 weeks ago

It was after hours on a weekend and I was helped within 2 hours or so. THANK YOU!
Matt quickly found the problem and was able to correct it quickly.

Verna Martin

1 month ago

Williams and his guys did an awesome job on my bathroom renovation. Recommend 100%

Orofacial Kozmetiks

1 month ago

My brother’s apartment was flooding from a very old and non maintenance water heater. The property manager was not capable of getting a plumber there for an emergency that happened around midnight. Marybeth at Pro-Flo Plumbing was able get someone out there in a timely fashion. I’m grateful that they were able to remove the most of water shut off the water.

Karen Jarrett

1 month ago

Only Business

2 months ago

Very friendly and helpful!

Ronnie Brown

2 months ago

These gentlemen were pleasant, fair, prompt and very reasonable. Good people

Ashley Fuller (XxMrS.FullerXx)

3 months ago

Great service and great price!!! Didnt take them but 15 or 20 mins to fix my leak under my sink! Thanks ..

Tammy Moore

3 months ago

I recommend anyone use your services you did a great job and the technician was very professional and carrying out his job clean up the whole nine yards done a great job I will be using you again in the future if needed

Sheena Rosario

3 months ago

My son noticed we had no water. I called around 12 by 2 the plumber was at the house. He figured out what was the problem in about 20-30 min. Gave me a quote and completed the work. By 4 o’clock he was done. Awesome company

Tulips

3 months ago

I am super late getting this review submitted. Purchased a home in February 2026 and needed a plumber asap for my basement. Called and received a timely response from the scheduler. Work was done on 2/23/26-Robert was professional and super helpful with explaining the process. They will be my go to for future needs.. Thank you, thank you for all you do.
Bridgette

james mclaughlin

4 months ago

Pro Flo plumbing fixed two issues in our home that we had been putting off. The price was fair, our plumbers were outstanding and both jobs were done right.
Pro Flo also has now helped the nonprofit animal shelter my wife and I work with (APS Caswell) twice and did a great job for the shelter as well. When you go with Pro Flow, you can count on knowledgeable professionals explaining everything thoroughly, and getting the job done right for a reasonable price. I know my family are Pro Flo customers for life.

Ray Wilson

5 months ago

Matt and his helper did a great job very clean and professional 👏 I had 2 holes in my cast iron p-trap coming from my washing machine and old broke down cast iron joints as you can see they re did it all and it's awesome no more worries for me thank you pro flow 😀

Brandy Wilson

6 months ago

Paid this company for nothing! Told them the issue (disconnected pipe and clogged) the man claimed he climbed under the house and seen no issue then charged me a service fee but he didn’t do anything and I had to call another company out and they had the problem fixed within an hour and a new pipe connected.

Lori Lee

6 months ago

We appreciate Pro-Flo Plumbing coming out and installing our water fountain for us today. We definitely recommend this business- we will be using their services again.

Related Services

01 Pipe Replacement

Failing galvanized and cast iron, handled in stages.

02 Whole House Repiping

When patching stops making sense on a mill-era home, we’ll say so, with a firm quote.

03 Leak Detection & Repair

That mystery water bill or damp spot, found without tearing your house apart.

Certified Backflow Service

Pro-Flo can inspect the assembly, perform required testing, identify failed components, and explain whether repair or replacement is appropriate. Call today for backflow preventer repair and testing in Danville, VA.

Or call now: 434-425-4933