We do fire line backflow testing anywhere in Dallas-Fort Worth, same day or next day, and your water utility has the passing report the day we test. Nearly every sprinkler line around here has a double check detector on it; of the 5,889 fire line assemblies in our records, 5,798 are that type. Leave us the alarm code and access, and you don’t need to be there.
A fire line backflow test proves that the two check valves in the assembly on your sprinkler line close tight, so water sitting in the sprinkler pipes can’t flow back into the city’s drinking water. We test it every year and after any repair.
The tester puts a differential pressure gauge on the test cocks, the small valves on the assembly body, and reads whether each check holds. On a plain-water sprinkler line, it’s a double check detector assembly, or DCDA: two check valves plus a bypass with a small meter, since the fire line has no other meter.
Our records hold 5,889 of these assemblies across 33 DFW cities, and 98.5% are DCDAs. Most are 4 to 8 inches, and 6-inch is the size we see most.
5,798on file in DFW
5,889
By pipe size, drawn to scale
By city
From our records: 4,239 properties in 33 DFW cities, October 2026.
The sprinklers are out of service only while the shutoff valves are closed, and they’re back in service before we leave.
We need the alarm code, or your monitoring company puts the system on test ahead of time. We also need a way into the riser room, vault or locked cage. Nobody else has to be there. The booking form already asks for the monitored fire line password and whether the backflow sits in a vault.
We close the two shutoff valves, which trips the switches on a monitored riser. That’s why the alarm goes on test first. Then the tester confirms each check holds and tests the detector bypass.
Both valves are open and the system is back in service. You know pass or fail on the spot, and every other backflow at the address gets tested the same visit.
Same day or next day.
Book today and a tester is at the building today or tomorrow. Our testers cover Tarrant, Parker, Johnson, Dallas and Denton counties. Most of the fire line assemblies in our records are in Fort Worth, and Arlington, Mansfield, Bedford, Southlake and Dallas get the same schedule.
One trip covers the property. About 9 in 10 properties with a fire line detector in our records also have a domestic or irrigation backflow on file, and we test them all on one visit. Big sites too: 902 properties have more than one fire line detector, 73 have five or more and one has 45. A campus gets one visit and one set of reports.
Portfolios sit in one account, with a certificate of insurance on request. Email the list to team@abstexas.com and we’ll schedule the sites together. More on backflow testing in DFW.
We’ve worked in this trade for more than 20 years and run more than 10,000 backflow tests across DFW. These reviews come straight from our Google profile.
If the fire line backflow fails, you know before we leave, and we repair double check detectors on fire sprinkler lines. The cause is usually small: grit on a check seat, worn rubber, or a check that stuck after sitting still all year.
We rebuild a failed DCDA rather than replace it, then retest it and file the new report with your water utility. A body cracked by a freeze, or a worn-out assembly, gets replaced. More on backflow repair and replacement.
Once the assembly passes, the report goes to your water utility that day.
A copy of the passing report reaches your inbox too. We file with the utilities in Fort Worth, Arlington, Dallas, Grand Prairie, Irving, Plano, Denton, Mansfield and the cities between.
A test the city never received does nothing for you, and it’s the most common problem on buildings that change hands. Keep our emailed copy with your sprinkler records as proof. Every assembly’s due date goes into our records, and the reminder comes from us before the next test. More on backflow compliance and reporting.
Property managers and portfolio owners, for one building or a whole list.
HOAs and condo associations with sprinklered buildings.
Facility managers at offices, schools, churches, warehouses and medical buildings.
Business owners with a utility notice in hand.
Luke Garner and Aiden Bristow run our tests, and both hold the TCEQ backflow tester license. Meet our testers.
Call
Search your address on the booking page and pick a time; openings start the same day or the next, and you see the price before you pay. Add the alarm code, and you don’t need to be there.
For a portfolio, call (817) 301-4247, Monday through Friday from 8 a.m. to 6 p.m. and Saturday from 9 a.m. to 3 p.m., or email team@abstexas.com.
Something else? Call (817) 301-4247
Every year, and again after any repair or replacement. The yearly test is the building owner’s or tenant’s to arrange, not the city’s. We keep the due date for every assembly we test and remind you before the next one comes up.
It can on a monitored system, because closing the shutoff valves trips the switches on the riser. Give us the alarm code, or have your monitoring company put the system on test before we arrive. That way the monitoring company knows the signal is a test, not a fire.
Only while the two shutoff valves are closed. Both open again once the gauge readings are done, and before we leave, we confirm the system is back in service and tell you pass or fail. Add the alarm code when you book.
No, as long as we can reach the assembly. A locked vault or riser room needs someone to open it or leave access, and a monitored fire line needs the alarm code. If a manager is on site, we check in when we arrive, and either way you hear pass or fail before we go.
It’s the detector meter. It sits on a bypass around the main checks and records small flows into the sprinkler line, so it should barely move. If it turns while the sprinklers sit idle, that points to a leak in the sprinkler piping or a check that isn’t closing. Call us.
Both are detector assemblies with a metered bypass. A DCDA has two check valves and goes on plain-water sprinkler lines. An RPDA adds a relief valve between the checks, for sprinkler water carrying antifreeze or foam or tied to another water source. Search your address on our booking page to see which you have.
No. Ours proves the checks hold against backflow, and the report goes to your water utility. The forward flow test shows the assembly passes enough water to the sprinklers and goes in your sprinkler inspection record. We file the backflow report with your utility and email you a copy.
Usually in the riser room, where the fire line enters the building. If the line runs a long way from the street connection, the assembly sits in a vault or an above-ground enclosure near the property line. The booking page shows what’s on file once you search your address.
Yes. We test every assembly at the address on one visit: domestic, irrigation and fire line. About 9 in 10 properties with a fire line detector in our records also have another backflow on file, so most buildings need one trip. More on irrigation backflow testing.