SIGMA offers the widest selection of fittings on the market today. Our quality assurance protocols exceed industry standards; we require that every single fitting be hydro-tested before it leaves the factory. Our fittings all have alpha-numeric heat codes which provide 100% traceability. This is SIGMA’s way of making sure that ours are the safest and most reliable fittings that money can buy.
SIGMA Corporation has been manufacturing products for the North American Waterworks Industry for over 35 years. We offer the highest quality ductile iron waterworks fittings, pipe restraint products, drainage solutions, piping and plumbing products, fire protection products, HDPE products, and municipal construction casting products available on the market today. SIGMA has both domestic and imported inventories, and our comprehensive network of warehouse locations throughout the US and Canada provides prompt, efficient, and reliable service to our customers.