Alamo Welding and Boiler - San Antonio Mechanical Contractor

South Texas Commercial and Industrial Steam & Hot Water Systems

Established in 1928, Alamo Welding & Boiler Works is a top-rated San Antonio mechanical contractor that specializes in the sales, rentals, servicing, and installation of commercial and industrial steam and hot water systems.  In addition to our boiler and mechanical expertise, we provide full‑service Commercial Plumbing solutions for facilities across San Antonio, Texas.

With over 95 years of experience serving South Texas, Alamo Boiler knows how to do it right.

San Antonio Boiler Service & Commerical Plumbing

It is all we do and we do it right.

Alamo Welding & Boiler Works in San Antonio, TX sells, rents, and installs complete steam and hot water systems; both domestic water and hydronic heating components. Our services include repairs, tube replacements, burner retrofits, heat exchangers, custom boiler feed tanks, and new installations for commercial and industrial clientele.  In addition to our boiler and mechanical expertise, we provide full‑service Commercial Plumbing solutions for facilities across San Antonio, Texas.

Please review our list of services, and Contact Us direct with any questions. Our team is on hand to discuss your needs and get your system running as quickly as possible at 210-227-6502.

Boiler System Install in San Antonio Texas
Alamo Boiler Pigs

OUR SERVICES

Repairs

We service all brands of boilers and repair finned tube heat exchangers including Raypak, Teledyne Laars, RBI, and more.
Learn More

Tube Replacement

Well-maintained boilers are reliable and more energy efficient. Our technicians provide boiler tube replacements for both commercial and industrial facilities.
Learn More

Heat Exchangers

Well-maintained heat exchangers are reliable and more energy efficient. Our technicians provide Heat exchanger tube replacements for both commercial and industrial facilities.
Learn More

Burner Retrofit

A Burner Retrofit service can reduce emissions and increase operational efficiency. In terms of overall fuel cost and use, the burner is the driver.
Learn More

Custom Boiler Feed Systems

Our Custom Boiler Feed Systems are a built-in solution for both industrial and commercial facilities. Options include compact dimensions, custom vertical or horizontal designs, and more.
Learn More

New Installations

New Installations can be provided with Domestic Hot Water, Hydronic Heating, Low Pressure Steam, and High Pressure Steam Systems. Built to suit, our heating systems can be matched to requirements and customized.
Learn More

Commercial Plumbing

We provide comprehensive Commercial and Industrial Plumbing services, including system installations, repairs, replacements, and ongoing maintenance for piping and water systems operating in demanding environments.
Learn More
About Us

Established in 1928, Alamo Welding & Boiler Works is a top-rated South Texas & San Antonio Mechanical Contractor that specializes in the sales, servicing, and installation of commercial and industrial steam and hot water systems / boilers.

 

Copyright © 2026 Alamo Boiler. All rights reserved.

NEW SERVICE ALERT
Alamo Welding & Boiler Works now offers

Commercial  / Industrial Plumbing Services