Get matched with top tankless water heater installers in San Marcos, TX

"It went well. They heiped get the manufacture to replace the heater for no charge. We had to pay for labor but still we didn't have to pay for the heater. Aaron was friendly and did a great job."

"We spent 14K on two new AC units for our house in 2021. We had to get the technicians out almost every year and multiples a year because something is always wrong. Some technicians were not experienced enough to diagnose the problem and wasted hours at our house. They also made careless mistakes (not connecting the draining pipe back in the attack) in Aug 2025. We had to run very loud fans for 5 days just to dry the water leak from the attic to our ceiling. The same technician was sent out in Nov 2025 and made the same mistake again. Now our ceiling is leaking again. The customer service did not even acknowledge or apologize for what we are going through. I am now worried that repeated leak may have caused permanent damage to our house. I do not recommend this company."

"Everything was good they came did the work and I am happy with the installers. Had gotten bid from other contractors but wanted someone to do all the work without having to use two different contractors. They fit the bill. I only wish that when the person who gives the quote that they don’t say something that is not true."

"In my case, it was Clinton, the son of the owner, that actually came to my house. He seems like a super nice guy, is clearly experienced and enthusiastic about his work, and did a pretty clean-looking job for what seems like a totally fair price, to me. I think you'll be happy with them; I am."

"Quick work"

"Dishonest. I was told free estimate but when tech arrived he said it was $150. Also tech didn’t know anything about gas fireplace. The owner is very unprofessional and scrupulous. I will be complaining to Toll Brothers about their service. Overall Incompetency"

"He explained everything thoroughly and was complete in his work. Showed me exactly what he was going to do and he did it in good time. He also had an apprentice with him that helped."

"I've used many plumbers over the years and Sustainable Plumbing is the best! Excellent communication, prompt service and excellent professional work. I couldn't be happier. Sharon Harpstead "

"They were great, came out to fix the problem next day. Checked that everything was working before they left for the day. Slight leak on toilet, came out to fix it. Very friendly and professional. "

"I had a Trane A/C installed by air systems. Carlos and his crew were on time, worked very efficiently and finished the installation within 1 day despite having to widen the attic opening. They cleaned up carefully and were professional in their communication. Also, their price was about $1000 less than the closest competitor. Would definitely hire them again!"