CAL-STEAM was founded in 1935 and has operated for over seventy years.. During the past twenty-five years,Cal Steam has grown from a single location in San Francisco to 12 locations throughout Northern California. Most recently,CAL-STEAM opened its twelfth location to serve customer needs in the Vacaville/Fairfield area. Its combined covered warehouse capacity of over 300,000 sq. ft. gives CAL-STEAM the largest inventory of plumbing and mechanical products in the Bay Area.