Water Heater Replacement in San Marcos, TX

Providing Reliable Hot Water Heater Installation Since 1996

Whether your hot water isn't working at all, or is simply not staying hot long enough for you to shower, you can count on the team at Reliable Air for expert water heater repair in San Marcos, TX.  We will always try to repair your water heater rather than replace it, but sometimes it makes more financial sense to get a new water heater instead of repair your old one. 

Signs You Need a New Water Heater

  • Water leakage around tank: Water leakage isn't always a guaranteed sign you'll need a replacement. But it's a major red flag if it comes from a crack in the tank. If you do see a crack, contact Reliable Air right away.
  • Uneven temperatures or no hot water: Is your water heater notoriously unreliable? Maybe it's only working for a few minutes at a time, or worse, not at all! There's no guarantee you'll need a replacement here, but when combined with other signs, you'll definitely want to consider a new system.
  • Constant repairs: If you've called plumbers to your home multiple times to fix your tank water heater, chances are deeper issues aren't being addressed. Constant repairs indicate that the system is on its last leg and needs replacement. This is especially true if the system is 15+ years old.
  • Increased usage limiting hot water: If you've had a few additions to your family but haven't replaced your water heater for a while, it may be time for an upgrade. We can help size your new water heater so you won't have to worry about hot water running out!

Call (512) 580-8837 or fill out our online contact form for same-day water heater repair or replacement in San Marcos, TX!


  • Reliable Relationships

    Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.

  • Reliable Scheduling

    With same-day service and 2-hour scheduling windows, you'll get service at a time that's convenient for you.

  • Reliable People

    Since we constantly train our employees, you can be 100% confident that your job will be done right—the first time.

Cost of a Tank Water Heater Installation in San Marcos, TX

The following factors determine the cost of installing a tank water heater:

  • Type and model of water heater: The most important factor when determining the price of a water heater installation is the water heater model itself. Tank water heater models vary across the board in price due to their heating efficiency, heating components (including electric, propane, and natural gas), and other factors.
  • Size of water heater: Tank water heaters come in a variety of gallon sizes. Sizing a water heater is important because it ensures enough capacity during peak use times (when the whole family is getting ready for the day, for example). Larger gallon sizes have higher costs associated with them.
  • Modifications to plumbing & permits: Sometimes when we're replacing a water heater, we come across other challenges that need to be resolved first. For example, we may modify an exhaust pipe, replace a valve, or install a new water collection pan or water alarm. Regardless of what you need, we can help you get it done.

Want an Accurate Install Price?

Contact us for an in-home estimate (it's free).

Why Choose Reliable Air?


  • Reliable people—Our water heater replacement specialists are licensed, insured, and trained to install most tank water heater models.
  • Reliable financing— High credit score? Low credit score? We can help people with either!
  • Reliable relationships—Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.

    Geoff came to fix our toilet that's been acting up for a couple of weeks now. He did a great job and was very professional. He was very kind and helpful. Thanks again for the great service!

    Michelle M.

    I am very happy with the professional informative technicians and office people at Reliable Air. I HIGHLY recommend this San Marcos company who now does plumbing. Today they installed my new water softener and I am very happy with their service. Thank You Geoff and Cheryl!!

    Lisa R.

How Our Process Works

1. Schedule Your Repair - We make it easy for you to schedule your duct repair service. Just give us a ring at (512) 580-8837 or use our online appointment scheduler. We offer 2-hour scheduling windows. We will send you a confirmation, so you’ll know when we’re arriving.

2. Notify You Before We Arrive - Your service technician will call you when they’re 30 minutes out. This way, you won’t have to wait around, wondering when they’ll get there.

3. Give You a Price - Prior to your service, your technician will inspect the areas that need repairing. They’ll also provide you with upfront and transparent pricing, so you never have to worry about receiving a surprise bill.

4. Complete Our Work - Once you’ve signed off on the quote, your technician will get straight to work. They’ll also let you know how long the service will take, so you can have peace of mind about how long they’ll be working in your home.

5. Make Sure You're Happy - No matter the job, each member of our team values efficiency and a job done right. To ensure that we lived up to your expectations, we’ll request feedback on our performance after the job is complete. We have a 100% satisfaction guarantee— and we mean it.

Ready for Reliable Service? Fill Out the Form Below or Call (512) 580-8837
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