Certified Backflow Preventer Testing
Annual state-required backflow testing with documentation submitted to your water authority.
To protect the public water supply, most municipalities require backflow prevention assemblies to be tested annually by a licensed professional. You will likely need testing if:
Backflow Preventer Testing — What Every Homeowner Should Know
When is Backflow Testing Required?
You receive an annual testing notice from your city or water district.
You have just installed a new backflow prevention device.
Repairs have recently been made to your backflow assembly.
Your property has an irrigation system, fire suppression system, or commercial boiler.
You are a commercial property owner.
Our Backflow Testing Process
Step 1: Schedule Your Appointment
Contact us by phone or online to set a convenient time for your backflow test. We'll confirm the details and answer any initial questions you may have.
Step 2: Perform Certified Testing
A licensed and certified technician will arrive on-site with calibrated equipment to perform a thorough test of your backflow prevention assembly. MPL-38162 — Texas Responsible Master Plumber ensures proper testing protocols.
Step 3: Submit Official Paperwork
Upon a successful test, we complete and submit all necessary documentation directly to your water purveyor on your behalf. You remain in compliance without handling bureaucratic paperwork.
Step 4: Complete Same-Day Repairs (If Needed)
If your device fails the test, our mobile warehouse circulating through your area carries common backflow parts for immediate repairs or replacement. We fix it. We carry it. We dispatch immediately.
We Service All Backflow Systems
Commercial & Industrial Systems
Large-scale backflow assemblies protecting water supplies in manufacturing facilities, office buildings, and industrial complexes. We carry commercial-grade parts and rebuild kits for immediate repair. No waiting for special orders or multiple service calls.
Lawn & Landscape Irrigation Systems
Backflow preventers protecting your home's drinking water from irrigation contamination. Our mobile warehouse stocks residential assemblies, check valves, and relief valves for all major sprinkler system brands. We test and certify on-site.
Fire Suppression & Sprinkler Systems
Critical backflow prevention for fire protection systems that cannot fail during emergencies. We maintain specialized inventory for fire service assemblies and provide certified testing documentation required by local fire codes.
Reduced Pressure Zone (RPZ) Assemblies
High-hazard protection systems with dual check valves and relief valve assemblies. We stock complete RPZ rebuild kits, differential pressure gauges, and replacement components for all manufacturers. Permanent repair, permanent solution.
Double Check Valve Assemblies (DCVA)
Standard protection for medium-hazard applications with two independently operating check valves. Our technicians carry valve seats, springs, and complete assembly replacements for immediate installation and testing.
Pressure Vacuum Breaker (PVB) Assemblies
Atmospheric protection preventing backsiphonage in irrigation and commercial applications. We stock air inlet valves, check valve components, and complete PVB units for same-day replacement and certification.
Why Choose Blackmon Plumbing?
State-Licensed & Certified Backflow Testers
Our technicians hold current Texas backflow prevention certifications. MPL-38162 — Texas Responsible Master Plumber backs every test we perform. You get compliant results that satisfy city requirements.
We Handle All Paperwork & City Submissions
We complete your test report and submit directly to Baytown utilities. No forms for you to track down. No deadlines for you to miss. We handle the bureaucracy so your property stays compliant.
Fully-Stocked Trucks for Same-Day Repairs
We don't chase parts. We bring them with us. Our mobile warehouse carries backflow valves, test cocks, and repair components. Failed device? We fix it. We carry it. We dispatch immediately.
Serving Baytown & The Gulf Coast Since 2007
Seventeen years of backflow testing across Harris and Chambers counties. We know local water pressure variations and common device failures. Experience delivers faster diagnosis and permanent solutions.
Upfront, Honest Pricing
Flat-rate, upfront pricing approved before work begins. No surprises when we finish. No hidden fees when devices need repair. You know exactly what backflow compliance costs.
24/7 Emergency Service Available
Backflow emergencies don't wait for business hours. Cross-connection contamination threatens your water supply immediately. We dispatch fully stocked trucks around the clock for emergency repairs and testing.
Service Areas
We provide certified backflow testing and repair services for commercial and residential clients throughout our service area, including Baytown, Houston, and surrounding communities. Our mobile warehouse circulates through established service corridors across the Gulf Coast region.
We dispatch fully stocked to handle backflow emergencies and scheduled testing requirements. Our MPL-38162 Texas Responsible Master Plumber certification ensures compliance with local municipal codes and state regulations.
Primary Service Coverage
Our box vans maintain regular routes through Baytown's industrial corridor, where petrochemical facilities require frequent backflow testing and immediate repair capabilities. We carry specialized backflow parts for commercial installations commonly found in this region.
Houston's sprawling commercial districts demand rapid response for backflow failures. We position inventory strategically to reach downtown office buildings, medical facilities, and restaurant chains within our standard dispatch window.
Pasadena's refinery operations and Deer Park's chemical plants rely on our certified testing services for regulatory compliance. We stock industrial-grade backflow assemblies and replacement components specific to these heavy industrial applications.
Extended Coverage Areas
League City and Friendswood residential communities receive the same fully stocked dispatch service. We carry residential backflow devices and testing equipment for single-family homes and townhome developments throughout these growing suburbs.
La Porte's waterfront properties and Seabrook's marina districts present unique backflow challenges due to saltwater proximity. Our mobile warehouse stocks corrosion-resistant assemblies and specialized testing gauges for these coastal environments.
Flat-rate, upfront pricing approved before work begins. One trip. Done. We fix it. We carry it. We dispatch immediately across our entire Gulf Coast service territory.
Backflow Preventer Testing Questions
Backflow occurs when contaminated water reverses direction in your plumbing system and flows back into the public water supply. Your backflow preventer stops this dangerous reversal using check valves and relief mechanisms.
Annual testing ensures these protective devices function properly. Failed preventers allow sewage, chemicals, or irrigation water to contaminate drinking water. The City of Houston requires certified testing to protect public health and maintain water quality standards.
Texas law requires annual testing for all backflow prevention assemblies. Your water authority sends renewal notices 30-60 days before your compliance deadline.
Commercial properties with high-hazard connections may require more frequent testing. We track your compliance dates and send reminder notices so you never miss a deadline or face water service disconnection.
Failed devices require immediate repair or replacement before we can issue passing certification. Our mobile warehouse carries complete rebuild kits, check valves, and relief valves for same-day repairs.
We perform the repair, retest the assembly, and submit passing results to your water authority. One trip. Done. No return visits or compliance delays that could trigger service disconnection.
We handle all compliance paperwork and electronic submissions directly to your water authority. Our certified testers complete official test forms and upload results to municipal databases within 24 hours.
You receive copies of all documentation for your records. We maintain digital files linked to your property address so renewal notices reach you automatically next year.
Standard testing takes 15-30 minutes per device using calibrated differential pressure gauges. We test check valve closure, relief valve opening pressure, and overall assembly integrity.
Failed assemblies requiring repair add 30-45 minutes for parts replacement and retesting. Our flat-rate pricing covers both testing and any necessary repairs—approved upfront before work begins.
Other Services You May Need
Water Heater Installation
Full tank water heater installation with code-compliant venting and gas line connections.
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Water Heater Repair
Same-day diagnosis and repair of gas and electric tank water heaters.
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Water Heater Replacement
Complete water heater replacement with old unit removal and code-compliant installation.
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Tankless Water Heater Installation
Navien tankless water heater installation with proper gas line sizing.
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Tankless Water Heater Repair
Certified Navien tankless service including descaling and error code diagnosis.
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Tankless Water Heater Replacement
Complete tankless water heater replacement with system upgrade and commissioning.
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House Repipe
Whole-house repiping to replace failing galvanized or copper pipes with modern PEX.
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Gas Line Repair
Emergency gas leak repair, line replacement, and red tag clearance.
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Gas Line Replacement
Complete gas line replacement from meter to appliances with code compliance.
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Gas Testing
Static pressure testing and gas leak surveys for residential and commercial systems.
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Backflow Preventer Installation
Professional backflow preventer installation for irrigation, commercial, and fire systems.
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Backflow Preventer Repair
Same-day repair of failed backflow devices with parts on the truck.
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Bathroom Remodel
Full-scope bathroom renovation including fixture relocation and new plumbing.
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Kitchen Remodel
Complete kitchen plumbing renovation for sinks, dishwashers, and gas appliances.
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Toilet Replacement
Complete toilet replacement with flange inspection, wax ring seal, and supply line upgrade.
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Water Line Repair
Emergency repair of water supply lines from meter to home.
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Water Line Replacement
Full replacement of water supply lines with modern materials.
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Commercial Plumbing Projects
Commercial plumbing for office build-outs, restaurants, and multi-unit properties.
View Service →What Customers Say
"As usual, Shane Blackmon, and his staff are awesome! You could not ask for a better group of people, being led by a man of great integrity. Thank you as my plumber and my friend. I also thank you for all your community..."
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"Dillion & Mac arrived as scheduled, and professionally installed my new water heater. They were courteous and friendly. They also saved me $60 by accepting a check vs a card. THAT'S total customer service!"
"I had 4 pipes burst and Bret was at my house within the hour and did a great job fixing them at an affordable price. Thanks so much y'all!"
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"Scott did a great job fixing my toilet. Would definitely recommend Blackmon."
"Brett and Leo were here. They were professional, efficient and friendly and did a great job in less time than expected. Hope they will both be back if we decide to install a new water heater."
"Came as soon as we needed them. Thought we needed a new water heater, but because of their honesty found out it was just a part needed. Thanks to Scott and Julio for a great job!"
"I had a wonderful experience with Blackmon Plumbing. Dylan arrived right on time. He was very polite, professional, knowledgeable and a hard worker! He had to haul an old toilet down the stairs and a new one up the stair..."
"We had a gas leak we needed found and fixed. They were able to fix it quickly with no hassle. Prices were fair! Would definitely do more business with them again."
"I had my kitchen faucet replacement last week and am very satisfied with Blackmon’s services. They only charged me one hour labor at a very reasonable price compared with other plumbing companies that tried to charge me ..."
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"Very thorough and polite. Most importantly, they can be trusted. Yes, there are still plumbers with integrity who take pride in their work. Back-up generator installation was quick and done well."
"The folks at Blackmon have a customer first attitude. They do what they say and say what they do. Michael came by after the job was completed to double check that all is well. 5 plus stars are earned and their business d..."
"Wow! I don't usually leave reviews, but what a great overall experience from Blackmon Plumbing! My faucet had a leak requiring replacement. They did such a great job installing my gorgeous new sink! I loved the customer ..."
"Fast install and good price, but don't appreciate them leaving trash and old fittings in the attic. Sloppy craftsmanship."