San Antonio Plumbing & HVAC Services

Radiant owners Brad & Sarah Casebier in San Antonio

World-Class Service With Texas Heart

Founded by husband and wife duo, Brad and Sarah Casebier, Radiant San Antonio is The River City’s finest in plumbing and HVAC. In 2021, Radiant acquired San Antonio’s Schmidt Mechanical Group, upholding its existing excellence in HVAC service and, most recently, adding plumbing to the list of service offerings. Our vast service area covers everything encapsulated by the 1604 Loop such as Converse, Alamo Heights, and Castle Hills as well as beyond like our Northeast neighbors in Schertz, New Braunfels, and San Marcos. Over the years we’ve been able to serve countless of Texas residents, and just as many have been kind enough to rate our performance at 5 stars. Today, we’re proud to hold a near-perfect rating with award-winning recognition. We would love nothing more than the opportunity to prove ourselves to you too! For all your plumbing, HVAC, and drain service needs, just call Radiant.

Local Home Service Options

At Radiant San Antonio, our main priority is to serve our local communities, and serve them well. That’s why we offer an array of home services to meet your every need. From the heart of San Antonio and outward towards areas such as Leon Valley and Kirby, you’ll see our eye-catching trucks on their way to serve your neighbors. Whether it’s leak detection, installation for your brand new AC unit, or a water heater flush, just call Radiant!


Water heaters, toilets, pipes & fittings: if it conveys fluid, our technicians can tackle it. Call today for anything from plumbing maintenance and repair to installation.

Learn More

Your HVAC unit should stand the test of temperature changes! We’ll ensure your home enjoys comfort for every season. Then you’ll say: “Ah, that’s more like it!”

Learn More

Some plumbing problems occur deep in the bowels of your home. Don’t sweat it! Our drain technicians are ready to get down and dirty to solve your problem today.


Learn More
5 Star Reviews

Our Record Speaks For Itself

Our record is stellar. We’re proud to don a 5-star rating on all major platforms, with hundreds of detailed reviews in tow. There’s a reason for that. Our entire company pulls in one direction to ensure you, the customer, has a 5 star experience. Your satisfaction is our top priority, and we’ll do whatever it takes to make your day. If it sounds too good to be true, just ask around!

Radiant San Antonio service area
We Travel Far And Wide
San Antonio Service Area

When we say we serve the entire San Antonio community, we mean it. As you can see, our service area spans from as far South as Somerset, to as far North as Timberwood Park, and everywhere in between. When you’re in the middle of a plumbing emergency, rest assured, you’re never far from a Radiant truck. The same goes for AC troubles in the middle of Summer. Relief from an expert Radiant technician is just a phone call away. Our headquarters is strategically located in the heart of San Antonio to serve as a launching pad for running calls. Unsure whether or not you fall within the scope of our service area? Just give us a call and you’ll have your answer in a matter of seconds.

Plumbing & HVAC Services FAQ

What are the most common plumbing issues?

When it comes to plumbing services, plumbing issues can range from a slow sink drain to a burst pipe. Some of the most common plumbing issues that we encounter include clogged toilets, frozen pipes during winter months, leaking sinks and faucets, and broken water heater elements. Other plumbing problems include plumbing leaks and faulty installations, as well as broken sewer lines due to tree roots. While the majority of plumbing issues can generally be avoided through preventive plumbing maintenance and regular inspections for certain plumbing components such as water heaters and garbage disposals, it’s important for homeowners to call a certified plumber from Radiant in order to ensure any plumbing issue is resolved quickly and professionally. For reliable plumbing services and drain cleaning services in San Antonio, look no further than Radiant!

What is a plumbing emergency?

When plumbing problems arise, they can range from minor inconveniences to catastrophic disasters that require immediate plumbing assistance. A plumbing emergency is considered any sudden plumbing issue or plumbing failure which could significantly impact the safety of individuals and/or property. Emergencies generally include flooding, burst pipes or blocked drains, gas leaks, strange odors coming from plumbing fixtures, no hot water, and wastewater backing up or spilling into the property. If you are faced with a plumbing emergency, it is important to contact our professional plumbing service right away to minimize damage and get the plumbing system running correctly again as soon as possible. Our plumbing service technicians have the necessary skills and techniques to properly address these kinds of crises, ensuring the job is completed safely and efficiently. With our plumbing services, you can be sure you will receive outstanding service every time!

How long do water heaters last?

On average, water heaters last between 10-12 years. Long-term plumbing investments such as water heaters should be installed and maintained by a reputable plumbing service like Radiant to maximize their lifespan. Investing in maintenance options can ensure your plumbing and hot water heater are running optimally for an extended period of time.  Call the experts at Radiant for timely plumbing service for your hot water heater today!

What are some tips for lowering my energy costs?

Lowering your energy costs starts with understanding and managing the way you use utilities such as your air conditioning system. Regularly checking air conditioning filters and making sure all seals and vents are airtight can help to maintain an efficient air conditioning system by controlling airflow and reducing air leaks. Smart thermostats that measure ambient air temperature, learn your daily habits, and adjust the temperature accordingly are another easy step for lowering energy costs. Additionally, closing blinds on windows during hot summer days and unplugging appliance cords when not in use to cut phantom power losses are small changes but have a large impact on reducing your energy costs. Furthermore, to cut down on heating costs, ensure that your heating vents are all open and unobstructed. Weatherize doors and windows to reduce drafts and add extra insulation if necessary. If it’s within your budget, you may also consider installing a high efficiency heating system to use less natural gas during cooler months. Better yet, certain qualifying HVAC systems which offer energy efficiency could give you a federal tax credit.

How long do HVAC systems last?

A properly maintained HVAC system is an integral part of a healthy home, and HVAC systems provide the air conditioning and heating necessary to maintain comfortable indoor air all year round. With proper installation, servicing, and maintenance, a typical HVAC system should have an average lifespan of 15 to 25 years. However, some modern systems can last even longer. While there are many factors that ultimately determine the life span of an HVAC system, regular servicing is generally the best defense against premature breakdowns or repairs. Investing in a high-quality air conditioning and heating system can help improve energy efficiency over time, potentially leading to improved indoor air quality and lower energy costs. If you are looking to experience fewer HVAC headaches, look no further than Radiant, a leader in the HVAC industry. We offer free estimates and hassle free scheduling on residential and commercial projects in and around San Antonio. For superior HVAC service, contact us today!

How often should I have my heating and cooling systems serviced?

Keeping up with HVAC maintenance is essential for staying comfortable in your home while avoiding unexpected repair costs. HVAC systems should be serviced at least once annually, particularly at the start of the heating and cooling season. Furthermore, monitoring HVAC filters every month and replacing them about every 90 days is key to ensuring optimal HVAC performance. Call Radiant today for a free system estimate!