About Us

Our capabilities extend beyond those of the traditional supplier—we are a long-term partner in the success of contractors, engineers, and facility managers across the Midwest. Family-owned for three generations, we’ve grown from a small St. Louis company into one of the region’s largest and most respected providers of piping, HVAC systems, and building automation solutions.

Through our 80+ years of experience, we have learned that the construction and mechanical industries thrive on trust, relationships, and performance. That’s why our team blends deep technical expertise with personalized service, ensuring that every customer receives more than just products—they receive support, guidance, and confidence at every stage of their project.

Our Mission:

To Create Shared Success Amongst Our Employees, Customers & Partners

Our Values

Integrity

To do the right thing without any expectation of gratitude or reward.

Respect

To treat others as we would like to be treated.

Passion

To compete, grow, and Win!

Trust

To deliver on our promises and be accountable for our actions.

Focus

To set targets and achieve objectives.

NSC has been serving the Mechanical Contractor and HVAC Industry for over 80 years, and it’s been quite a journey. We’re excited to have you as part of our story!

NSC Helps Our Customers…

Execute their projects on time and on budget through just-in-time vendor managed inventory, and our team of experts in pipes valves fittings, applied HVAC, and building automation.