Every install we do covers the full scope, from the permit to the walkthrough. Here is what is standard on a Dallas tankless job and what we handle as an add-on when your home needs it.
The tankless unit itself, copper pipe or PEX tubing, a gas flex connector, stainless steel or PVC venting, isolation valves, a pressure relief valve, and Teflon tape. We use manufacturer-approved parts so your warranty stays intact.
We pull the plumbing permit and schedule the inspection. That keeps the work legal, insurable, and code-correct under Uniform Plumbing Code and International Plumbing Code. You get a copy of the permit and the inspection sign-off.
For gas units, we run the line, set manifold pressure with a gauge, and verify combustion with an analyzer. For electric units, we run the dedicated 240-volt circuit and size the breaker. Either way, the hookup is done to code.
We route stainless steel or PVC venting to manufacturer spec and confirm all clearances from windows, doors, and intakes. Bad venting is the most common cause of warranty denial and carbon monoxide risk. We get it right the first time.
We purge the gas line, run every hot tap, and check flow with a water flow meter. A thermal camera confirms even heat across the exchanger. If anything reads off, we fix it before we leave your driveway.
We show you how to set temperature, read the error code display, and locate the isolation valves. Then we register the manufacturer warranty and email you the paperwork. You leave the job knowing exactly how your system works.
Tankless water heater installation Dallas TX means replacing your storage tank with a wall-mounted unit that heats water only when a tap opens. That means running a dedicated gas line or a 240-volt circuit, mounting the unit on a load-bearing wall, routing stainless steel venting through the roofline or sidewall, and tying in isolation valves and a pressure relief valve so the system can be serviced later. We pull the permit, install to Uniform Plumbing Code and International Plumbing Code standards, and walk you through the controls before we leave.
Most Dallas homeowners call us because their 40 or 50-gallon tank cannot keep up with two showers and a dishwasher at once. Older homes in Oak Lawn and East Dallas often still run on a tank that is 12 to 15 years old, and once the heat exchanger starts leaking, replacement is the smarter call. If you have been searching for tankless water heater installation Dallas TX near me and want a straight answer on sizing, we will measure your flow rate with a water flow meter and tell you exactly what your house needs.
Every job follows the same five steps, from the first phone call to the final walkthrough. Here is exactly what happens and how long each stage takes.
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Manifold pressure gauge
We check gas pressure at the unit inlet and set it to manufacturer spec. Wrong pressure causes ignition failure, flame failure, and premature wear on the gas valve.
Combustion analyzer
Verifies the exhaust is within safe limits after install. We test carbon monoxide and oxygen levels before we sign off. It is the only way to confirm a gas unit is burning clean.
Thermal camera
Maps heat across the heat exchanger and finds hot spots or cold zones that signal scale buildup or a failing exchanger. We use it on installs and diagnostics.
Water flow meter
Measures your actual peak flow rate in gallons per minute. Sizing a tankless unit without this number is guesswork, and guesswork leads to cold showers.
Descaling pump and flush kit
Circulates descaling solution through the heat exchanger to dissolve mineral scale. We use it on every flush and recommend it every 12 to 18 months in Dallas.
Pipe wrench and tube brush
For gas and water connections and for cleaning fittings before assembly. A clean joint with Teflon tape does not leak. A rushed one does.
Multimeter and pressure gauge
Tests electrical continuity on electric units and confirms system pressure on the water side. Both are standard on every install and repair call.
Uniform Plumbing Code and International Plumbing Code compliance
Every install follows UPC and IPC standards for venting, gas sizing, and pressure relief. We pull the City of Dallas permit and pass inspection. Code-correct work protects your insurance and your resale value.
Manufacturer-specific venting and gas setup
Rinnai, Navien, Noritz, and Rheem each publish their own venting clearances and gas pressure specs. We follow the manufacturer's manual to the letter so your warranty stays valid and the unit runs at rated efficiency.
Flow-rate sizing with a water flow meter
We measure your peak demand and incoming water temperature, then match the unit to your house. Dallas winter water runs about 55 degrees, which changes the sizing math compared to summer. We size for the coldest month, not the average.
Isolation valve installation on every job
Isolation valves let a future tech flush the unit without draining the whole house. We install them on every install, which turns a two-hour descaling job into a 45-minute one. That saves you money on every future service call.
01
What we do: We run same-day tankless water heater installation Dallas service when slots are open. A tech arrives, removes the failed tank, and installs a correctly sized unit in four to six hours. We pull the permit and schedule the inspection for the next business day.
→ You have hot water back the same evening, guests are comfortable, and the old tank is hauled away. No weekend hotel, no cold showers.
02
What we do: We measure the tub fill rate and the home's peak flow, then recommend a unit that handles both the tub and the existing showers. We run the gas line and venting to code and tie the unit into the new bathroom loop.
→ The new tub fills fast with hot water, and the rest of the house never notices a temperature dip. The remodel passes inspection without a hitch.
03
What we do: We handle all three permits, install gas tankless units in each unit, and set the temperature to a safe, tenant-friendly level. We register each warranty and leave a maintenance card for the tenant.
→ Hot-water complaints stop, gas bills drop, and the landlord has one number to call for all three properties. Turnover gets easier.
04
What we do: We size a 9 to 11 GPM unit based on their actual peak flow, install it on the garage wall, and add a recirculation pump so hot water reaches the far bathroom in seconds. The install takes one day.
→ Morning showers run back to back with no cold surprises. The recirculation pump cuts wait time at the far tap from 30 seconds to about 5.
Dallas has its own set of conditions that shape every tankless install. Summer incoming water runs 65 to 70 degrees, but a January cold snap can drop it to 55, which changes the sizing math and pushes some homes to a larger unit. Older neighborhoods like Oak Lawn, Deep Ellum, and East Dallas have 1920s to 1950s housing stock with undersized gas lines and venting that was never designed for a tankless unit. We often need to upsize the gas run or route new stainless steel venting through the roof. Newer builds in North Dallas and University Park usually have the gas capacity already, so the install is faster. The City of Dallas requires a plumbing permit on every water heater replacement, and we pull it for you. If you have been looking for tankless water heater replacement and installation Dallas TX, we handle both the swap and the conversion. We also carry freeze protection kits because North Texas cold snaps can damage an exposed unit overnight.
Uptown Dallas
High-rise condos often have limited wall space and shared venting chases. We size smaller units and route venting through approved chases to stay within HOA rules.
Oak Lawn
Many 1940s homes still run undersized gas lines. We frequently upsize the gas run to support a tankless unit and pass the City of Dallas inspection.
East Dallas
Bungalows here often have the water heater in a cramped closet. Wall-mounting a tankless unit frees up floor space and simplifies venting through the sidewall.
North Dallas
Newer construction usually has the gas capacity and venting already in place, so most installs finish in four to five hours with no surprises.
University Park
Larger homes with long pipe runs benefit from a recirculation pump. We install and program the pump so hot water reaches the far bathroom in seconds.
Hard water across most of Dallas County
Mineral-heavy water scales the heat exchanger faster than in softer regions. We install isolation valves and a water filter on every job and recommend descaling every 12 to 18 months to protect the unit.
Winter cold snaps dropping incoming water to 55 degrees
Colder inlet water demands a larger unit to hit the same output temperature. We size for January, not July, so your unit keeps up on the coldest morning of the year.
Aging gas infrastructure in older neighborhoods
Homes built before 1960 often have gas lines sized for a tank heater, not a tankless unit. We measure pressure and upsize the run when needed so the unit fires reliably.
City of Dallas permit and inspection requirements
Every water heater replacement needs a plumbing permit and inspection. We pull the permit and schedule the inspection so your install is legal, insurable, and code-correct.
Most people call us because something is already going wrong with their hot water. Here are the problems a new tankless install fixes for good.
Problem
A 40-gallon tank cannot keep up with two showers and a dishwasher at once. You end up with cold water mid-shampoo and a house full of frustrated people.
Our Fix
We size a tankless unit to your peak flow rate, usually 7 to 11 gallons per minute. That means back-to-back showers, laundry, and dishes all run at once without a temperature dip. The unit fires only when a tap opens, so it never runs out.
Problem
A leaking tank can dump 40 to 50 gallons before you notice. That means water damage to drywall, stored boxes, and sometimes the car. Insurance claims for water damage average thousands of dollars.
Our Fix
We remove the failing tank, install a wall-mounted tankless unit, and pressure-test every connection before we leave. No tank means no 50-gallon flood risk. The unit hangs above the floor, so a slow drip cannot pool under it.
Problem
A storage tank reheats water 24 hours a day, even when nobody is home. In Dallas, that standby loss can add 20 to 30 percent to your water-heating bill every month.
Our Fix
Tankless units heat on demand and stop when the tap closes. Most Dallas homes see a real drop in gas use within the first billing cycle. The unit pays back part of its cost every month you own it.
Problem
A 50-gallon tank eats a closet or corner of the garage that could hold storage, a freezer, or a stacked washer and dryer. In tight Dallas bungalows, that lost space is a real problem.
Our Fix
A tankless unit mounts on the wall and takes up roughly the footprint of a carry-on suitcase. We reclaim the floor space and often free up enough room for shelving or a second appliance. The install looks clean and stays out of your way.
Problem
Dallas water runs mineral-heavy, and scale builds inside the heat exchanger faster than in softer regions. Left alone, scale causes pressure drop, loud noises, and eventually heat exchanger failure.
Our Fix
We install isolation valves and a water filter on every job so future descaling is quick and clean. We can also tie in a water softener on the cold inlet. That single change can double the time between flushes and protect the exchanger.
A tankless unit changes how your whole house uses hot water. Here is what you actually get when we finish the install and turn the gas back on.
Endless hot water supply
A properly sized tankless unit delivers 7 to 11 gallons per minute, so back-to-back showers, laundry, and a running dishwasher no longer fight for the same 50 gallons. In a four-person Dallas household, that alone ends the 7 a.m. cold-shower problem. You get hot water on demand for as long as you need it.
Lower monthly gas bills
Tankless heaters stop paying to keep 50 gallons hot around the clock. Most Dallas homes see 20 to 30 percent lower water-heating gas use after the switch, which adds up fast during summer AC season when the utility bill is already high. The unit only fires when you open a tap.
Frees up real floor space
A tankless unit hangs on the wall and takes up roughly the footprint of a carry-on suitcase. In a tight Dallas bungalow or a converted garage apartment, that reclaimed closet space often becomes storage or a stacked washer and dryer. No more bulky tank in the corner of the garage.
15 to local experience life
With annual descaling and a water filter, most tankless units run 15 to 20 years, roughly double a tank heater. We install isolation valves on every job so future flushing takes 45 minutes instead of a full drain-down. That keeps your warranty intact and your unit running clean.
Google ★★★★★4.9
Fast, clean install of a Navien unit in our Oak Lawn home. They pulled the permit, ran new venting, and walked us through the controls. The old tank was gone by 3 p.m. and hot water was back before dinner. Fair price and no upsells.
Yelp ★★★★★4.8
Called on a Saturday with no hot water and a house full of family. They had a tech out the same afternoon and installed a new tankless unit on Monday. The gas bill is already lower. Highly recommend for anyone in Dallas.
BBB ★★★★★4.9
We manage three rentals in East Dallas and used them for all three tankless installs. Permits handled, warranties registered, tenants happy. They know the Dallas code requirements and it shows. We will use them again.
Google ★★★★★5.0
Professional from the first phone call. They measured our flow rate before recommending a unit instead of just selling us the biggest one. Install took five hours and the closet looks cleaner than before. Endless hot water with two teenagers in the house.
Our plumbers hold a Texas State Board of Plumbing Examiners (TSBPE) license and carry NATE certification on gas-fired equipment. We have completed manufacturer-specific training with Rinnai and Navien, so we know the venting clearances and gas pressure specs those units demand. Every tech on our crew has worked hundreds of tankless installs across Dallas County, from 1920s bungalows in East Dallas to new builds in North Dallas. We also hold EPA Section 608 certification for refrigerant and combustion work, and we follow OSHA safety standards on every job site.
Real answers to the questions we hear most often from local homeowners and property managers.
If your existing tankless unit throws an error code or stops firing, we diagnose and repair it fast. We stock common parts for Rinnai, Navien, and Rheem units so most Dallas repairs finish in one visit. Call us before you replace a unit that just needs a fix.
View Tankless Water Heater RepairAnnual maintenance keeps your new install running at peak efficiency. We check gas pressure, clean the inlet filter, and inspect the heat exchanger for scale. Dallas water runs hard, so a yearly visit pays for itself in avoided repairs and lower gas use.
View Tankless Water Heater MaintenanceWhen a tankless unit reaches the end of its life, we swap it for a new one without disturbing the existing venting or gas line. Most replacements take three to four hours. We haul the old unit away and register the new warranty the same day.
View Tankless Water Heater ReplacementA tune-up covers descaling, filter cleaning, and a full combustion check. We recommend one every 12 months in Dallas, where mineral-heavy water builds scale faster than in softer regions. A tuned unit holds its efficiency rating and avoids mid-winter breakdowns.
View Tankless Water Heater Tune-UpsScale buildup is the number one killer of tankless units in Dallas. We connect a descaling pump and flush kit, circulate descaling solution through the heat exchanger, and restore full flow. Most units need this every 12 to 18 months depending on water hardness.
View Tankless Water Heater Flushing & DescalingElectric tankless units suit homes without gas service or tight spaces. We run the dedicated 240-volt circuit, size the breaker, and mount the unit. Electric installs are often faster and cheaper upfront, though gas units usually cost less to run month to month.
View Electric Tankless Water Heater InstallationCall (214) 817-0188 any time, day or night, and we'll get a real person on the line. For non-emergency work, most Dallas jobs get a same-day or next-day appointment. You can also email info@waterheaterrepairs.com and we'll respond within one business day.
Phone
(214) 817-0188Address
14205 Proton Rd, Dallas, TX 75244, Dallas, Texas
Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available
