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Swap failed or aging units · Open 24/7

Tankless Water Heater Replacement in San Antonio, TX

Failed and aging tankless water heaters replaced, gas or electric, with the venting and gas supply checked against the new unit.

Call or text, 24/7(210) 756-3144
  • Priced before we start
  • Licensed & insured
  • Open 24/7
  • Work guaranteed
Technician measuring a water heater space for a replacement
Technician measuring a water heater space for a replacement, Lone Star Plumber & Drain

How the job goes

Tankless Water Heater Replacement, explained

We match or upgrade the unit, confirm the gas line and venting meet the new model's requirements, and install isolation valves if the old setup did not have them.

If you would rather go back to a tank, we quote that too.

From recent Lone Star jobs

Water heater installed in a utility room
Water heater installed in a utility room
Gas water heater with venting in a closet
Gas water heater with venting in a closet
Rheem water heater after installation
Rheem water heater after installation

What changes the price

What goes into a tankless water heater replacement quote

Every job is quoted flat after we see it. These are the things that move the number.

FactorWhy it matters
Like for likeSame brand and venting is the simplest swap.
Isolation valvesAdding valves for descaling if the old install lacked them.
Venting changesA different model may need new venting.
In business
Family-owned and veteran-owned, serving San Antonio since 2017
Owner
Brad Perkins, raised in the trade in San Antonio
Languages
English and Spanish. Se habla espaƱol.
Pricing
Flat-rate pricing, no-pressure sales. Call to talk.
Warranty
Warranty on all work
Availability
Calls answered 24/7, 365 days a year

How a visit works

Four steps, one price

  1. 1Call or textAnswered 24/7. We ask what you are seeing and how to shut off water or gas if needed.
  2. 2DiagnoseWe find the actual cause, with a camera, gauge, or photo you can see.
  3. 3Flat quoteYou get one price and decide. No hourly meter.
  4. 4Fix and guaranteeWork done, tested, site cleaned, workmanship guaranteed.

Hot water in San Antonio

Tankless Water Heater Replacement in San Antonio: local factors

Many San Antonio tankless units fail early because they were never descaled. Hard water builds scale in the heat exchanger. The replacement is a chance to add isolation valves and a scale filter so the new unit lasts.

We work from 8666 Huebner Rd and cover the Medical Center, Leon Valley, Castle Hills, Shavano Park, Helotes, Alamo Ranch, Stone Oak, Alamo Heights, and the surrounding communities, around the clock.

Questions

Tankless Water Heater Replacement FAQ

Can I switch back to a tank?

Yes. We quote both.

How long does a replacement take?

Usually half a day for a like-for-like swap.

A leak costs more every hour it runs.

Shut the supply off if you can reach the valve, then call. We answer 24 hours a day, 7 days a week.

Call (210) 756-3144