Plumbing De Soto, MO | HVAC | B F Mahn & Sons Plumbing & Heating

Call Us Today!

(636) 586-2300

About Us

B. F. Mahn & Sons has been family-owned and operated since 1868, and provides top quality plumbing and HVAC services to clients across Jefferson County, MO. For 6 generations, our family has taken care of families just like yours.

Learn More »


For the best commercial or residential plumbing and HVAC services look no further than B. F. Mahn & Sons. We provide a full range of trustworthy services for both individuals and business owners.

Learn More »

Contact | Plumbing | Johnson Plumbing Inc | Mercad, CA


We offer a range of plumbing and HVAC equipment brands, so you can find exactly what you're looking for. We are dedicated to helping you find the products and brands you want to enhance your home or business.

Learn More »

Welcome to B. F. Mahn & Sons, Inc!

For 6 generations, B. F. Mahn has delivered top quality work to meet your residential or commercial plumbing and HVAC needs. We serve clients across Jefferson County and beyond with a variety of services ranging from new construction plumbing to minor daily repairs. Our business is built on a strong foundation and is know for its impeccable reputation and first quality service skills. From our beginning, we have worked to be the company you can trust, and have been resilient through ups and downs in the economy.