Tankless Water Heater Replacement in Baytown, TX
Complete tankless water heater replacement with system upgrade and commissioning.
While durable, tankless systems eventually need replacement. If you notice any of these issues, it's time to call the experts at Blackmon Plumbing:
Tankless Water Heater Replacement — What Every Homeowner Should Know
Signs It's Time for a Tankless Water Heater Replacement
The unit is over 15-20 years old
Frequent error codes or system lockouts
Inconsistent water temperatures or pressure
Rising energy bills without increased usage
Visible leaks, rust, or corrosion on the unit
The cost of repairs is approaching half the cost of a new unit
Our Tankless Water Heater Replacement Process
Step 1: On-Site Consultation & System Sizing
We assess your current setup and calculate exact GPM requirements for your family's hot water needs. No guesswork—we size systems based on simultaneous fixture demand and peak usage patterns.
Step 2: Safe Removal of Your Old Unit
Our technicians safely disconnect, drain, and remove your existing water heater. We handle tank or tankless units with proper disposal protocols and zero water damage to your property.
Step 3: Venting & Gas Line Upgrades
We inspect and upgrade venting systems and gas lines to meet high-efficiency tankless requirements. Code-compliant installations ensure safety and optimal performance from day one.
Step 4: New Tankless Heater Installation
We mount your new Navien tankless unit and connect water, gas, and electrical lines per manufacturer specifications. Precision connections prevent callbacks and ensure warranty coverage.
Step 5: System Commissioning & Testing
We power up the unit, test all safety features, and calibrate for peak efficiency. Temperature consistency testing across all fixtures confirms proper operation before we leave.
Step 6: Final Walkthrough & Cleanup
We demonstrate system operation, answer your questions, and leave your space cleaner than we found it. You get full operational knowledge and a spotless work area.
Choosing the Right Tankless System For You
High-Efficiency Condensing Units
The most common choice for Houston homes. These units capture and reuse exhaust heat for maximum energy savings. We stock condensing models that deliver 95%+ efficiency ratings. Lower gas bills start immediately after installation.
Non-Condensing Units
A reliable and more budget-friendly option for replacement where extensive vent changes are not feasible. Perfect for straightforward swaps in existing installations. We carry these units when your current venting works fine. No additional modifications required.
Natural Gas vs. Propane (LP)
We install and service systems for both fuel types, ensuring a proper and safe connection. Our mobile warehouse stocks conversion kits and specialized fittings for both. Gas line sizing and pressure testing included with every installation. We verify safe operation before we leave.
Indoor vs. Outdoor Models
Depending on your home's layout and climate, we can install a unit either inside your home or on an exterior wall to save space. Outdoor units eliminate venting complexity entirely. We assess your specific situation and recommend the best placement. Freeze protection and weatherproofing handled by our certified technicians.
Why Choose Blackmon Plumbing?
Authorized Navien Dealer
— We sell, install, and service with full manufacturer backing. Factory warranties protected. Direct parts pipeline guaranteed.
Factory-Trained & Certified Technicians
— Our plumbers complete Navien's technical certification program. We diagnose faster. We repair correctly the first time.
Navien Units Stocked on Our Trucks
— Mobile warehouse circulating through your area carries complete Navien inventory. We don't chase parts. We bring them with us.
Upfront, Transparent Pricing
— Flat-rate, upfront pricing approved before work begins. No hourly surprises. No hidden fees.
Gas Line Certified Plumbers
— MPL-38162 — Texas Responsible Master Plumber licensed for gas line installation and repair. Safety protocols followed precisely.
Family-Owned & Operated Since 2007
— Three generations of Houston plumbers. We live here. We work here. Your neighbors trust us.
24/7 Emergency Service Available
— We dispatch fully stocked mobile warehouses around the clock. One trip. Done. Permanent repair, permanent solution.
Service Areas
Blackmon Plumbing provides expert tankless water heater replacement for homeowners and businesses in Baytown, Houston, and surrounding communities. Our mobile warehouses circulate through established service corridors to deliver permanent solutions across the Gulf Coast region.
We dispatch fully stocked trucks to Baytown neighborhoods where hard water destroys conventional units faster than inland areas. Houston commercial properties rely on our MPL-38162 Master Plumber expertise for code-compliant installations. Pasadena industrial facilities trust our tankless retrofits for consistent hot water delivery.
Deer Park homeowners call us for emergency tankless repairs when coastal humidity accelerates component failure. We serve La Porte waterfront properties where salt air demands specialized tankless models. Seabrook marina facilities depend on our commercial-grade tankless systems.
Our coverage extends to League City subdivisions, Friendswood family neighborhoods, and Pearland master-planned communities. Webster aerospace workers and Clear Lake NASA contractors choose our tankless expertise for reliable performance.
We fix it. We carry it. We dispatch immediately across the Greater Gulf Coast. One trip. Done.
Tankless Water Heater Replacement Questions
Navien tankless units typically run 15-20 years with proper maintenance. That's double the lifespan of traditional tank heaters. We stock genuine Navien parts and filters in our mobile warehouse to keep your system running at peak efficiency throughout its service life.
Most tankless replacements take 4-6 hours when gas lines and electrical connections are already in place. We dispatch fully stocked with all necessary fittings, connectors, and mounting hardware. One trip. Done.
Many homes need larger gas lines to feed tankless units properly. We measure existing line capacity during our initial assessment. Our trucks carry gas pipe, fittings, and regulators for immediate upgrades when required. No return trips for parts.
Tankless systems deliver endless hot water and use 30% less energy than tank heaters. You reclaim 16 square feet of floor space and eliminate flood risk from tank failures. Plus, you get precise temperature control and lower monthly utility bills.
We provide multiple financing options for qualified customers. Our flat-rate, upfront pricing is approved before work begins—no hidden costs or surprise charges. MPL-38162 Texas Responsible Master Plumber ensures code-compliant installation every time.
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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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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Backflow Preventer Testing
Annual state-required backflow testing with documentation submitted to your water authority.
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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..."
"I am so happy I chose Blackmon plumbing. The young lady in the office (Liz) is great at her job. I had my kitchen faucet fixed by the end of the day. I felt like I was an important VIP because of the fast, good service I..."
"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!"
"Bret came out to do the annual service on our tankless hot water heater. The flush went well and our system looked in good shape. Bret knew exactly what was needed, was efficient, and my cost for this I consider to be a ..."
"Blackmon Plumbing connected gas to my home, which was a rather challenging endeavor due to the amount of pipe required to complete the connection. Doday and Mario did an outstanding job. The job required extremely precis..."
"We cannot speak highly enough of Dylan at Blackmon Plumbing! Dylan was incredibly professional, not only with us but also with our tenants, who had been without hot water for two weeks. Despite the challenging circumstan..."
"We are very pleased with the service from Blackmon Plumbing. Dylan and Dodany completed 5 different projects at our home this week. They were knowledgeable, prompt, responsive and courteous. Will use them again."
"Bret and Shane are awesome! Totally recommend them for plumbing!"
"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 ..."
"This company is fantastic. Shane and Laurie are very professional and a pleasure to do business with. I would highly recommend this to everyone."
"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."