Sigma Corp. will pay $2 million and Star Pipe Products will pay $641,250 to end a case in which Yates Construction Co. alleged antitrust violations under state and federal law, including the Sherman and Clayton acts.

Plaintiffs argued that the companies, along with nonsettling defendant McWane Corp., conspired to keep prices high for ductile iron pipe fittings used in municipal drinking water and wastewater systems. Sigma’s settlement includes $1.805 million in cash and up to $200,000 for notice costs. Star’s portion includes $150,000 for notice costs.

The defendants are represented by Jason Allen Leckerman, Stephen J. Kastenberg and Roberto A. Rivera-Soto of Ballard Spahr. The case is Yates Construction Co., Inc., v. Sigma Corporation et al., case number 3:12-cv-00169, in the U.S. District Court for the District of New Jersey.