SIGMA Corporation is a global company offering a wide range of water and wastewater infrastructure products, fire protection and OEM products. We are the leader in many of the markets in which we operate and are distinguished by our innovative quality and supply chain processes. We continue to develop new products and services, meeting the changing needs of our valued customers every day.

Established in 1985 by engineers with new ideas for servicing the water and wastewater industries, SIGMA has grown into a global company with a major presence in the U.S and Canada, and loyal customers around the world.

We continuously strive to create safer, better, more cost-effective products for the worldwide water and wastewater industry. Company achievements include:

  • SIGMA is one of the leading suppliers of AWWA approved fittings, by both volume and innovation.
  • SIGMA is the #1 supplier of Pipe Restraint Products (PRP) to the North American and Canadian waterworks markets.
  • SIGMA has the widest range of Pipe Restraints available; our product line spans 2-64 inch restraints.
  • SIGMA is the first in the industry to bring 54-64 inch Wedge Restraints to market.
  • SIGMA is the only supplier of Municipal and Construction Castings serving the entire North American market.

The company is recognized for its product innovation, having developed and introduced:

  • Large diameter Wedge and PVC Bell restraints,
  • Innovative PV-LOK and split ONE-LOK joint restraints,
  • SigLet, a U.S. manufactured high-strength, low-cost threaded welding outlet for fire sprinkler systems.

SIGMA is unique in providing the widest selection of Drainage Solutions in the U.S. today. We brought Hydrotec, the innovative trench drain solution for storm water management, from Europe to the U.S. market and currently offer the broadest selection of trench drains solutions, working with U.S. manufacturers such as PolyLok. We are uniquely positioned to offer steel, concrete and plastic trench drain systems.

Staying true to our roots, SIGMA still provides the widest selection of fittings available on the market today.

• Quality
• Service
• Commitment
• Delivered.