Licensed install, repair, and service for every major brand
Tankless Water Heaters waco TX: Endless Hot Water, Lower Bills
A tankless water heater waco TX homeowners rely on delivers hot water on demand, not from a 50-gallon tank reheating all day. We install, repair, and maintain on-demand water heater waco systems for families in McLennan County, from 76701 to 76712. If your tank is rusting out or you're tired of cold showers, we'll size the right unit and have it running same-day.
Live phone supportUpfront optionsBacked workmanship
What's included
What's Included in a Tankless Water Heater Job
Every install and repair we run covers the essentials. If your job needs something beyond the standard scope, we tell you before we start and price it separately.
Unit Sizing and Selection
We calculate your peak flow rate in GPM and match it to a unit that holds temperature. For a 2-bath Waco home, that's usually an 8 to 9 GPM condensing model. We stock Rheem, Navien, and Rinnai so you're not waiting on a special order.
Permit and Inspection
We pull the City of Waco plumbing permit and schedule the inspection. That covers gas line sizing, venting, and clearance to combustibles. If the inspector flags something, we fix it and re-inspect at no charge.
Venting and Gas Work
Standard PVC venting for condensing units, stainless for non-condensing. If your gas run is undersized, we upsize it to 3/4-inch during the install. That's included in the quoted price, not a surprise add-on.
Old Unit Removal
We drain and haul off the old tank or failed tankless unit. That includes the disposal fee. You don't have to wrestle a 150-pound tank out of a closet or pay a separate junk hauler.
Startup and Walkthrough
We purge the gas line, set the outlet temperature to 120 degrees, and test flow at every fixture. Then we show you the display panel, the error code list, and how to shut the unit down if you ever need to.
Service overview
What a Tankless Water Heater waco TX Actually Does
A tankless water heater waco TX is a demand-type system that heats water only when you open a faucet, running cold supply through a high-output heat exchanger and out at a set temperature. No standby tank, no reheat cycle. Most units mount on a wall, vent through PVC or stainless, and pull 120,000 to 199,000 BTU depending on flow. That means two showers and a dishwasher at once without the temperature swing you get from a tank.
Waco homes run into two problems a tank handles poorly: hard water scaling the tank interior, and a garage or closet that eats 12 square feet of storage. If your tank is 10-plus years old or you're finishing a garage apartment, an on-demand water heater waco install usually pays back faster than another tank replacement. We see it most in older bungalows near downtown and newer builds out toward Hewitt where the mechanical closet is tight.
How we workWe verify the cause, compare realistic options, and confirm the repair before we leave.
The service timeline
Our Tankless Installation Process
The process flexes to the condition, but these checkpoints keep decisions clear.
Phone Sizing
We ask how many bathrooms, how many people, and whether you have a gas meter or propane. That tells us the flow rate and BTU load. A 3-bedroom, 2-bath Waco home usually needs 8 to 9 GPM. Takes about 10 minutes on the phone.
On-Site Assessment
A licensed tech checks gas line size, venting path, water hardness, and available wall space. We confirm whether your existing 1/2-inch gas run can feed a 199,000 BTU unit or needs upsizing to 3/4-inch. You get a written price before we touch a wrench.
Permit and Install
We pull the City of Waco plumbing permit, isolate the gas and water, remove the old tank, and set the new unit. Most swaps run 4 to 6 hours. If we're converting from electric to gas, add a day for the gas line and vent work.
Commissioning
We set the outlet temperature, usually 120 degrees, purge the gas line, and test flow at every fixture. You'll see us run the master shower and the kitchen sink at the same time to confirm the unit holds temp. Then we walk you through the display panel.
Follow-Up
We call at the 30-day mark to confirm everything's holding. If you're on Waco's harder water, we schedule the first descale at 12 months. Annual tankless water heater maintenance waco Texas visits keep the warranty valid and the exchanger clean.
Tools & methods
Tools and Methods We Use on Tankless Jobs
Purpose-built equipment, used by trained technicians, so the job is done accurately the first time.
Manifold Gauges
We use manifold gauges to verify gas pressure at the tankless unit and the furnace. Low pressure causes ignition failures and temperature swings. Testing at the appliance catches it before it becomes a callback.
Combustion Analyzer
A combustion analyzer checks CO levels at the tankless flue and the furnace vent. That's a safety requirement on every gas appliance we touch. It also confirms the unit is burning clean after a repair.
Descaling Pump Kit
We circulate a vinegar or commercial descaler through the heat exchanger for 45 to 60 minutes. In Waco's 8 to 12 grain water, that's the single most important maintenance step. It restores flow and efficiency.
Pipe Threader and Press Tool
For gas line upsizing and venting modifications. A press tool lets us make code-approved joints without open flame in a tight closet. Faster and safer than sweating copper next to drywall.
Digital Flow Meter
We measure actual GPM at the shower and kitchen faucet to confirm the unit is sized right. Guessing flow rate is how homeowners end up with a unit that can't keep up. We measure, then spec.
Use cases
When Waco Homeowners Call Us for Tankless
These examples show how the service framework adapts rather than forcing every call through one repair.
Error-Code Lockout to Same-Day Repair
A Woodway family's Rheem unit threw an error code every few weeks and shut down mid-shower. Two other companies quoted a full replacement at $4,200. The unit was only six years old. → We found a scaled heat exchanger and a clogged inlet filter. A 60-minute descale and a $40 filter fixed it. Total bill was $285. The unit has run without a lockout for eight months.
Frozen Condensate Line to Winter-Ready Install
A Bellmead rental lost hot water during a January freeze. The condensate line ran along an exterior wall and iced solid. The tenant was without hot water for two days before the property manager called. → We thawed the line, rerouted it with a proper slope, and added heat trace and insulation. The repair took two hours. The unit ran through the rest of the winter without a single freeze shutdown.
Problems we solve
Tankless Problems We Fix in Waco Homes
Most tankless failures trace back to water quality, gas supply, or a sensor. Here are the calls we run most often.
Unit throws an error code and shuts down
We pull the code, test the flow sensor and the gas valve, and descale the exchanger if it's scaled. Most Waco error-code calls are fixed same-day for $180 to $350 in parts and labor. We carry Rheem and Navien sensors on the truck.
Hot water temperature fluctuates
We clean the inlet filter, test gas pressure at the unit, and check the mixing valve. In hard-water Waco homes, the filter clogs every 6 to 12 months. We show you how to rinse it yourself between service calls.
Unit won't ignite at all
We test the igniter, the flame sensor, and the gas supply at the meter. If it's a utility issue, we tell you to call the gas company and we don't charge a diagnostic. If it's the igniter, we replace it on the spot.
Condensate line freezes in winter
We thaw the line, reroute it with a slope and a heat trace if needed, and insulate the exterior run. That prevents the same freeze from killing your hot water next winter. Takes about two hours.
Pricing process
Tankless Water Heater Pricing in Waco
$2,800 - $4,500 installed for a standard swap; $180 - $650 for most repairs
Unit Size and BTU
A 199,000 BTU condensing unit costs more than a 140,000 BTU non-condensing model. Larger homes with multiple bathrooms need the bigger unit. That's usually a $400 to $800 difference in equipment cost.
Gas Line Upsizing
If your existing gas run is 1/2-inch, we upsize to 3/4-inch for a high-BTU unit. That adds $300 to $700 in parts and labor. Skipping it causes ignition failures and voids most warranties.
Venting Configuration
Standard PVC venting through a wall is cheapest. Long runs, roof terminations, or stainless venting for non-condensing units add $200 to $600. Attic installs with a horizontal run cost more than a straight exterior wall.
Customer reviews
What Waco Customers Say About Our Tankless Work
★★★★★
“Our 12-year-old tank finally let go on a Sunday. Called Monday morning, had a tech out by noon, and a new Navien running by 5 p.m. They upsized the gas line and pulled the permit. No cold showers since. The price matched the quote to the dollar.”
★★★★★
“We kept getting an error code on our Rheem every few weeks. Two other companies wanted to replace the whole unit. These guys cleaned the flow sensor and descaled the exchanger for a couple hundred bucks. That was eight months ago and it hasn't skipped once.”
★★★★★
“I manage six rentals around Waco and switched three of them to tankless. Their crew handles the permits and the inspections, which saves me a headache. Tenants stopped calling about running out of hot water. I've used them for AC repairs too.”
Are tankless water heaters worth it in waco TX?
Yes, for most Waco households that plan to stay put five years or more. The unit costs more upfront, roughly $2,800 to $4,500 installed, but it lasts 15 to 20 years versus 8 to 12 for a tank. Add the 20 to 30 percent gas savings and the math works. If you're moving in two years, a tank replacement is cheaper.
How much does tankless water heater installation cost in waco?
Typical 2026 pricing in Waco runs $2,800 to $4,500 for a standard gas tank-to-tankless swap. That covers the unit, permit, venting, and labor. Converting from electric to gas adds $800 to $1,500 for the gas line. Longer vent runs or a 3/4-inch gas upsizing push it toward the top of the range.
How long do tankless water heaters last in waco Texas?
Expect 15 to 20 years with annual descaling. Waco's water runs 8 to 12 grains hard, which scales the heat exchanger faster than soft water. Skip maintenance and you'll see 7 to 10 years. We set up a 12-month descale schedule and install an inline filter to protect the unit.
Can I replace my tank water heater with tankless in waco TX?
Yes, and it's the most common job we run. We check your gas meter capacity, venting path, and wall space first. Most Waco homes have room. If your gas line is undersized for a 199,000 BTU unit, we upsize it during the same visit. The swap takes 4 to 6 hours.
Related services
Other Services Waco Homeowners Pair With Tankless
Air Conditioning Installation
If you're replacing the water heater and the AC in the same season, we coordinate both installs to share the permit and the crew. One inspection, one set of trips. Common in Waco homes over 15 years old.
Air Conditioning Repair
A failing AC and a leaking tank often show up together in August. We diagnose both on one visit so you're not paying two trip charges. Our techs carry manifold gauges and water heater parts on the same truck.
Air Conditioning Maintenance
Annual AC tune-ups and annual tankless descaling line up on the same calendar. Bundle both and we handle the filters, the refrigerant check, and the heat exchanger flush in one appointment. Saves you a service call.Ready when you are
Get Your Tankless Water Heater waco TX Quote Today
Licensed, insured, and stocked with the parts your unit needs. Call (844) 681-2495 and we'll size the right tankless system for your Waco home, or get a repair tech out the same day. Upfront pricing before we start.
Talk with the local team
Request Tankless Water Heaters
Feel free to reach out to us for any HVAC inquiries. We are available Monday through Friday, with same-day responses.