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Backflow Assembly Testing

Drainage All Services

Schedule your annual backflow test today.

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Backflow preventer repair in progress showing replacement of check valve disc

Annual Backflow Testing in Dallas-Fort Worth, Waco, Temple & Austin

Texas requires every backflow prevention assembly to be tested at least once a year by a TCEQ-licensed tester. If your annual test is due — or overdue — Duck Works handles the full process: scheduled testing at your convenience, a detailed pass/fail report, and electronic filing with your water utility, usually the same day. We test RPZ, DC, PVB, and SVB assemblies for commercial, industrial, institutional, and residential properties across the I-35 corridor from Dallas-Fort Worth through Waco, Temple, and Austin.

Why Your Backflow Preventer Needs an Annual Test

TCEQ-licensed tester performing annual backflow assembly test on an RPZ device

Backflow prevention assemblies are mechanical devices with internal check valves, springs, and seals that wear over time. A device that passed last year can fail this year — and a failed assembly means contaminated water (pesticides, chemicals, bacteria, or sewage) can flow backward into the public drinking water supply through cross-connections on your property.

That’s why the Texas Commission on Environmental Quality (TCEQ) mandates annual testing under Title 30 of the Texas Administrative Code §290.44(h). Your local water utility enforces this requirement. If your test is missed or your assembly fails and isn’t repaired and recertified, the utility can issue a notice of non-compliance — and ultimately shut off your water service.

Annual testing isn’t optional. It’s the law, and it protects everyone downstream.

Schedule a Backflow Test
Call (469) 722-3262
TCEQ-licensed tester performing annual backflow assembly test on an RPZ device

Assembly Types We Test

We test all testable backflow prevention assemblies, including:

Cross-connection survey inspector examining plumbing connections in a commercial building
Cross-connection survey inspector examining plumbing connections in a commercial building

We test all testable backflow prevention assemblies, including:

  • RPZ (Reduced Pressure Zone) The highest level of protection. Required on commercial domestic water lines, fire lines, boiler feeds, medical facilities, and any connection classified as a high-hazard cross-connection. RPZ assemblies have two independent check valves with a relief valve between them that opens to atmosphere if either check fails.
  • DC / DCVA (Double Check Valve Assembly) Used for low-to-moderate hazard connections such as irrigation systems, fire sprinkler lines (where permitted), and commercial HVAC makeup water. Two independently acting check valves in series.
  • PVB (Pressure Vacuum Breaker) Common on residential and commercial irrigation systems. Uses a spring-loaded check valve and an air inlet valve. Must be installed at least 12 inches above the highest downstream point.
  • SVB (Spill-Resistant Vacuum Breaker) Similar to PVB but designed to prevent water spillage during normal operation. Often used indoors or where spill containment is a concern.

Most properties with serious drainage issues need a combination of both, and that’s exactly what we assess during your free evaluation.

Who Needs Annual Backflow Testing?

If your property has a backflow prevention assembly installed, it needs to be tested annually. Common scenarios include:

Backflow preventer repair in progress showing replacement of check valve disc
  • Commercial buildings Offices, retail, restaurants, and mixed-use properties with RPZ or DC assemblies on domestic and fire water lines
  • Apartment complexes and HOAs Master-metered properties with RPZ on the main supply and DC on irrigation
  • Hospitals, clinics, and medical facilities RPZ assemblies on domestic supply, boiler lines, medical gas lines, and lab connections
  • Schools and universities Irrigation systems, science labs, cafeteria kitchens, and custodial connections
  • Industrial and manufacturing facilities Process water lines, cooling towers, chemical feed systems, and washdown stations
  • Government and municipal buildings Per city utility code requirements
  • Residential properties with irrigation If your home has an in-ground sprinkler system, your PVB or DC assembly must be tested annually
Backflow preventer repair in progress showing replacement of check valve disc

Your water utility tracks your compliance. When your test is due, they expect results — and they follow up when they don’t get them.

Our Process

What Happens During a Backflow Test

01

Scheduling

You call or submit a request online. We schedule at a time that works for your facility — including early mornings, evenings, or weekends for properties where a water shutoff during business hours isn't practical.

02

On-Site Testing

Our TCEQ-licensed Backflow Prevention Assembly Tester (BPAT) arrives with a calibrated differential pressure gauge kit and tests each assembly per TCEQ procedures. Testing typically takes 15–30 minutes per assembly, depending on size and accessibility.

03

Pass/Fail Report

You get a detailed test report documenting each assembly's serial number, location, type, test readings, and pass/fail status. This is completed on TCEQ Form 20700 — the official Backflow Prevention Assembly Test and Maintenance Report.

04

Electronic Filing

We file the completed test report with your water utility electronically — usually the same day. No chasing paperwork, no missed deadlines on your end.

05

If It Fails

If an assembly doesn't pass, we diagnose the issue on-site and can often repair and recertify during the same visit. No waiting for a second appointment or hiring a separate contractor.

Why Property Managers and Facility Teams Choose Duck Works

20+ Years of Regulatory Experience

20+ Years of Regulatory Experience

Our Director of Compliance spent over two decades managing backflow prevention and cross-connection control programs at the municipal level — overseeing approximately 600 inspections per year. She’s the person who used to enforce the rules. Now she’s on your side of the table.

TCEQ-Licensed BPAT and CSI Certified

TCEQ-Licensed BPAT and CSI Certified

Our testers hold active TCEQ Backflow Prevention Assembly Tester (BPAT) licenses and Customer Service Inspector (CSI) certifications. We don’t subcontract testing to unlicensed techs.

Same-Day Reporting and Filing

Same-Day Reporting and Filing

Most test reports are completed on-site and filed with your water utility the same day. You get your copy immediately — no waiting weeks for paperwork.

Test, Repair, and Recertify in One Visit

Test, Repair, and Recertify in One Visit

If an assembly fails, we carry common repair kits for all major assembly types. Most repairs happen on-site, followed by an immediate retest and updated filing — all in one trip.

Dallas to Austin — Full I-35 Corridor

Dallas to Austin — Full I-35 Corridor

We serve commercial, industrial, institutional, and residential properties across Dallas, Fort Worth, Hillsboro, Waco, Temple, Belton, Killeen, Georgetown, Round Rock, and Austin.

FAQs

Backflow Assembly Testing FAQs

  • How often does my backflow preventer need to be tested?

    At least once per year, per TCEQ regulations (Title 30 TAC §290.44(h)). Some water utilities or specific hazard classifications may require more frequent testing. Your utility will notify you when your test is due, but it's your responsibility to schedule it.

  • How long does a backflow test take?

    Most individual assembly tests take 15–30 minutes. If you have multiple assemblies on a commercial property, we can usually test them all in a single visit. We'll give you a time estimate when you schedule.

  • What happens if my backflow assembly fails the test?

    We diagnose the failure on-site and, in most cases, repair and retest during the same visit. Common failures include worn check valve seats, fouled relief valves, or debris in the assembly. If a part needs to be ordered, we'll schedule a return trip as soon as it arrives. Learn more about repairs & recertification →

  • Who is required to have a backflow preventer?

    Any property with a connection that could allow non-potable water to flow back into the public water supply. This includes commercial buildings, irrigation systems, fire sprinkler lines, medical facilities, industrial process connections, and more. Your water utility determines the requirement based on the hazard level at your property.

  • Do I need to be present for the test?

    Someone needs to provide access to the assembly and, if necessary, be available to authorize a temporary water shutoff. For commercial properties, this is typically a facility manager or maintenance contact. For residential irrigation systems, we just need access to the device (usually located near the meter or in the valve box).

  • Can I test my own backflow assembly?

    No. Texas law requires testing to be performed by a TCEQ-licensed Backflow Prevention Assembly Tester (BPAT). Even if you're a plumber or the property owner, you cannot self-certify your own assembly unless you hold an active BPAT license.

Stay Compliant — Schedule Your Annual Backflow Test

Don’t wait for a non-compliance notice from your water utility. Schedule your annual test today and get same-day results and filing.

Schedule a Backflow Test
Call (469) 722-3262

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