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Mueller Industries’ Streamline PRS™ press fittings are the trusted, quality solution to flameless copper joining. Streamline PRS™ is Mueller Industries’ solution for professionals choosing to join copper tubing through the use of press technology. The company’s Streamline® brand has been the trusted name in copper piping systems since 1930. With Streamline PRS™, this heritage of quality and reliability is now available for contractors preferring flameless, mechanical press joining.