Who we are

At CAL-STEAM, we specialize in serving the product needs of commercial plumbers and mechanical contractors in Northern California. Our knowledgeable associates understand the commercial trade industry and are dedicated to providing world-class customer service and expert product solutions. As the region’s largest distributor of plumbing and mechanical supplies, you can trust us to help you get the job done with fast access to the right products.


CAL-STEAM has served as a trusted plumbing and mechanical supply partner for trade professionals since 1935. During the past 30 years, the company has grown from a single location in San Francisco to 13 strategic locations across Northern California. Our tenure as an organization is a testament to our commitment to serving professional tradespeople. We take pride in helping our customers achieve success through reliable access to quality products.

Who we serve

Professionals across the trade industry rely on CAL-STEAM for our expansive inventory of plumbing and mechanical supplies. Discover the range of customers who benefit from our product support and see how we’ll provide your business with the same high level of service. Visit one of our locations to get the products you need for your next project.

Mechanical contractors

Residential plumbers

Commercial plumbers

Industrial organizations

Government entities