About SIGMA

SIGMA Corporation was established in 1985 by engineers with new ideas for servicing the water and wastewater industries.

Where we began…

Over the next four decades, SIGMA pioneered sourcing in China and India with strict quality protocols, introduced proprietary designs for a variety of products, made multiple strategic acquisitions, and set the industry standard for customer service.

SIGMA has grown into a $500 million dollar global corporation with a major presence in North America and Asia, and thousands of loyal customers around the world. SIGMA Corporation offers a wide range of water and wastewater infrastructure products, original equipment manufacturing products and services (OEM), precision castings, and HDPE products. We are a market leader distinguished by innovative quality and supply chain processes, and we offer both domestic and global sourcing options. Our engineers are constantly developing new products and services to meet the changing needs of our customers every day.

Larry Rybacki
“Collaboration, mutual respect, honesty, and trust. That’s how we work together as a team and how we treat our customers, and that will never change.”
— Larry Rybacki, President

Our Portfolio of Companies

SIGMA Companies International

SIGMA Companies International provides a wide range of water infrastructure products, OEM services, HDPE products, and plumbing and fire protection products to customers throughout North America.

Meet the SIGMA Team

Why Choose SIGMA?

Quality

SIGMA Quality Assurance Experts start by thoroughly inspecting each factory before approving it as a SIGMA manufacturer. They examine every facet of the operation from the procurement of raw materials to the maintenance of equipment through the fabrication process. SIGMA’s heat coding process is revolutionary in the industry. We stamp each item with manufacturing data so it is traceable back to its origin. This ensures that we can track each item, and identify every fitting from the batch. This is just one way SIGMA assures our customers, distributors, partners, and end users that ours are the safest products on the market. 

Commitment

SIGMA constantly strives to put the customer first. This was our model from the day we opened our doors, and along with quality, continues to be our top priority. We constantly evaluate our supply chain to achieve maximum efficiency, and our customer service representatives are trained in best practices to be sure they are anticipating and meeting customers’ needs without fail. We conduct ongoing reviews of sourcing and procurement protocols to ensure that we use the most innovative and effective approaches, and achieve maximum accuracy and efficiency for the benefit of our customers.

Service

The stability and longevity of SIGMA’s employees offer a powerful testament to their commitment to the Company and our customers. Fully 54% of SIGMA’s employees have been with the Company for over 10 years, and many for far longer. This demonstrates SIGMA’s strength, as well as the dedication of our personnel. Additionally, the experience of our team means that there is significant expertise behind every transaction. SIGMA’s team is committed to providing quality product and efficient service, and we have years of experience doing just that.