Tankless Water Heaters in Nacogdoches County TX
Endless Hot Water, Installed and Maintained the Right Way
A tankless water heater gives you on-demand hot water with no tank, longer service life than a traditional unit, and lower energy use over time. The catch is that tankless systems are unforgiving when they’re sized wrong, installed without a proper gas-line upgrade, or skipped on annual maintenance. Peace of Mind Plumbing installs, repairs, and maintains Navien, Rinnai, and Rheem tankless units across six East Texas counties. Texas Master Plumber RMP 41912 on every job, with $225 flat-rate annual maintenance.
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Solutions for Every Plumbing Need
From clogged drains to whole-house repipes, here’s what we handle across Deep East Texas.
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You’ll speak with Nicholas or a plumber directly, not an answering service.
Tankless Done Right the First Time
Tankless water heaters are not a swap-in replacement for a tank-style unit. Done right, they’re a meaningful upgrade — per ENERGY STAR, tankless water heaters can be 24 to 34 percent more energy efficient than traditional storage tank water heaters in homes that use 41 gallons or less of hot water daily. Done wrong, the efficiency advantage disappears under error codes and early failure. The right install requires accurate sizing for the household’s peak demand, a properly sized gas line (most existing supply lines are too small for the higher BTU draw a tankless needs), correct venting, condensate handling on condensing models, and a water-side configuration that accounts for East Texas hard water. Skip any of those steps and the unit either underperforms, throws error codes, or fails years before its expected service life.
We install Navien, Rinnai, and Rheem because those three manufacturers have the best parts availability, warranty support, and field reliability in the East Texas market. We also service tankless units installed by other contractors, so if your home already has a tankless system that isn’t performing the way it should, we can diagnose and fix it regardless of who put it in.
Owner-operated by Nicholas Singleton, Texas Master Plumber RMP 41912, with more than 35 years in the trade. Same Master Plumber on every install, every repair, and every maintenance visit. Licensed, bonded, insured, and the gas-line work that comes with most tankless installs is handled in-house, not subcontracted.
Just Good Plumbing
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Real Plumber
Reach Nicholas or a licensed plumber directly, not a call center or sales rep.
35+ Years in
East Texas
Master Plumber serving East Texas with decades of residential and commercial experience.
Honest Upfront Pricing
We explain the issue and quote the job before any work begins.
Brands that Hold Up
Rheem, Delta, Kohler, and InSinkErator products backed by a 1-year warranty.
When to Call About a Tankless Water Heater
- Hot water taking longer to reach the tap
A tankless unit that used to deliver hot water in 20 seconds and now takes 40 or 60 is usually showing scale buildup on the heat exchanger. The unit is still firing, but reduced flow through the scaled exchanger means slower delivery to your fixtures. A descaling service usually fixes it. Skip it long enough and the heat exchanger itself can crack.
- Tankless unit throwing error codes
Navien, Rinnai, and Rheem all use error code systems that point to specific failures: scale buildup, gas pressure issues, venting blockages, flow sensor problems, ignition failures, or condensate drain issues. The code on the display is a starting point. We read the code, run diagnostics, and identify the root cause before quoting a repair.
- Cold water sandwich (hot then cold then hot)
A burst of hot water followed by a few seconds of cold and then hot again is the classic “cold water sandwich” complaint. Common in tankless setups where the unit is undersized for peak demand, where the gas supply can’t keep up, or where the water is being drawn from multiple fixtures simultaneously beyond the unit’s flow rate. Either a sizing fix, a gas-line upgrade, or in some cases an additional unit in parallel.
- Reduced flow rate or weak hot water pressure
Tankless heat exchangers are precision components, and East Texas hard water deposits scale fast. Once enough scale builds up, the flow rate the manufacturer rated the unit at drops, and your shower goes from strong to weak. Annual descaling keeps this from happening. A unit that’s been running without maintenance for three or four years often needs a serious descaling pass before normal flow returns.
- Tankless unit is over 15 years old
Tankless water heaters can run 20 years or more with proper maintenance, but the back half of that lifespan is when components start failing. Heat exchangers, flow sensors, and igniters are common late-life failures. If your unit is over 15 and you’re seeing recurring issues, replacement is often more cost-effective than another round of repairs, especially with current ENERGY STAR efficiency improvements over older models.
What We Do for Tankless Water Heaters
Tankless Water Heater Installation
New tankless installs for homeowners switching from a tank or building new construction. We size the unit based on your peak hot water demand and the incoming groundwater temperature (East Texas runs cooler than Gulf Coast, which affects sizing), upgrade the gas line where needed for the higher BTU draw, install proper venting, set up drainage on condensing models, and complete a full water-side configuration. Navien, Rinnai, or Rheem, gas or electric where applicable.
Tankless Water Heater Replacement
Existing tankless unit at end of life or no longer worth repairing.
We pull the old unit, evaluate the existing gas line, venting, and water connections for code compliance and capacity, install the new unit (matching brand or upgrading based on your preference), pressure-test the gas, and verify proper operation before leaving.
Tankless Water Heater Repair
Error code diagnosis, flow sensor replacement, igniter repair, gas valve replacement, venting issues, condensate drain blockages, and heat exchanger work. We carry common parts for Navien, Rinnai, and Rheem on the truck, so most repairs are completed the same visit. Repairs we can’t handle the same 0ay get a written quote and a parts-order timeline before we leave.
Tankless Water Heater Maintenance ($225 Flat Rate)
Full annual maintenance: unit cleaning, descaling of the heat exchanger, calcium and mineral buildup removal, gas connection inspection, venting inspection, flow rate check, error log review, and a written summary. Flat $225 regardless of brand. East Texas hard water makes this the single most important thing you can do to keep a tankless unit performing at spec and reaching its full service life.
Why Tankless Makes Sense in East Texas
- Lower Energy Use Over Time
A tankless unit only fires when you call for hot water. A traditional tank reheats stored water around the clock to maintain temperature, even when no one is home. ENERGY STAR data shows tankless units can deliver 24 to 34 percent better efficiency in low-to-moderate hot-water-use households. Over a 15 to 20 year service life, the energy savings often offset the higher upfront cost.
- Hot Water That Doesn't Run Out
A correctly sized tankless unit delivers hot water as long as you’re calling for it. Two showers running, dishwasher cycling, laundry going. The limit is the unit’s flow rate, not a 50-gallon tank that empties out partway through the morning. For households that regularly run hot water from multiple fixtures, this is the single biggest day-to-day quality-of-life difference.
- Less Floor Space, Wall Mounted
Tankless units mount on a wall and take up about the space of a small medicine cabinet. The floor space a 50-gallon tank used to occupy is now usable square footage. Particularly valuable in older Nacogdoches and Lufkin homes where the water heater closet is shared with the laundry or the HVAC return.
- Longer Service Life With Maintenance
Traditional tanks typically last 10 to 15 years before the tank itself corrodes through. Tankless units have no tank to corrode and can run 20 years or more with annual maintenance. The maintenance is non-negotiable in East Texas hard water, but it’s a straightforward $225 service that adds years to the unit’s life.
What a Full Tankless Install Looks Like
A tankless install is a multi-trade job, even when handled by a single Master Plumber.
Here’s what’s typically involved on a residential conversion from a traditional tank to a new tankless system: removal of the existing tank, gas line evaluation and upsize where needed (most homes need this), new gas shutoff valve and sediment trap, mounting the unit (interior or exterior depending on layout), running new venting, installing the unit’s water connections with isolation valves for future maintenance access, condensate drainage for condensing models, electrical hookup where required, pressure-testing the gas line, commissioning the unit, registering the manufacturer warranty in the homeowner’s name, and a final walkthrough on the display and maintenance schedule.
Every install is performed to current Texas plumbing code. The gas-line work is in-scope, not subcontracted. Our 1-year labor warranty covers the install work itself, on top of the manufacturer warranty (typically 12 to 15 years on the heat exchanger).
Related Plumbing Services
Still considering a tank-style unit instead? We install and service Rheem traditional water heaters in 40 and 50 gallon sizes, gas and electric, with the same Master Plumber on every job.
Most tankless conversions need a gas line upgrade because the existing supply is undersized for the higher BTU draw. We handle gas line installation and repair alongside the tankless install under one scope, no second contractor required.
The $225 tankless maintenance is one of our flat-rate plumbing specials. The other is a $75 home sale plumbing inspection, useful for buyers and sellers who want a clear read on the home’s plumbing before closing.
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What Your Neighbors Are Saying
- Sydney kroll
Always quick to respond and committed to figuring out the issue. Professional, courteous and reasonable. Highly recommend
September 28, 2025
- latricia jacobs
I called them Friday and they said they’d be out first thing Monday morning and they were here by 8:30. They did high quality repair work on pipes and replaced two sink facets. It looks so much better than before and works like there was never an issue. The best part of this review is they were REASONABLE on charges. Highly recommend!
June 17, 2025
- Christopher Young
May 20, 2026
- Christopher Young
May 20, 2026
- Sydney kroll
Always quick to respond and committed to figuring out the issue. Professional, courteous and reasonable. Highly recommend
September 28, 2025
- latricia jacobs
I called them Friday and they said they’d be out first thing Monday morning and they were here by 8:30. They did high quality repair work on pipes and replaced two sink facets. It looks so much better than before and works like there was never an issue. The best part of this review is they were REASONABLE on charges. Highly recommend!
June 17, 2025
Serving Nacogdoches County and Piney Woods.
Peace of Mind Plumbing operates out of Nacogdoches and covers a six- county stretch of Deep East Texas Nacogdoches, Angelina, Shelby, San Augustine, Rusk, and Cherokee. Whether you’re in a city or out on a county road, we make the drive. Most communities in our service area have no local master plumber with a dedicated online presence, which is exactly why we built this site so you can find us when you need us and know what to expect before you call.
- Don't see your town listed? Call (936) 652-6335 If you're within our range, we'll tell you straight.
Tankless Water Heater Questions
Straight answers. No filler.
Is a tankless water heater worth it in East Texas?
For most households, yes, but with a real condition: only if it’s installed correctly and maintained annually. Hard water in this region builds scale on tankless heat exchangers faster than soft-water markets, so a tankless unit that’s never descaled will underperform and fail early. With proper install and the $225 annual maintenance, tankless makes sense for most homes that have a gas supply available.
How much does a tankless water heater cost in East Texas?
Total install cost depends on the unit (brand, model, BTU rating), whether the existing gas line needs upsizing, whether venting needs to be replaced, and the complexity of the location. We provide a written quote before any work begins. The $225 maintenance is flat-rate regardless of brand.
How long does a tankless water heater last?
Typically 20 years or more with annual maintenance, compared to 10 to 15 years for a traditional tank. Skipping the annual descaling cuts that lifespan significantly in East Texas water conditions. The heat exchanger is the most expensive component, so protecting it through routine maintenance is what makes the long lifespan actually achievable.
Tankless vs tank: which should I choose?
Tank is cheaper upfront and a fine choice for households with predictable, moderate hot water needs. Tankless costs more upfront but uses less energy, lasts longer, takes up less space, and delivers continuous hot water. The right choice depends on your hot water usage patterns, your fuel type, your budget, and how long you plan to stay in the home. We’ll walk through both options when we look at your existing setup.
Do you service tankless units that someone else installed?
Yes. Repair, descaling, error code diagnosis, and the $225 annual maintenance are all available regardless of who installed the unit. Same scope, same flat-rate maintenance pricing, same Master Plumber on every visit.
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