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Mainline Backflow Products was established in 1997. The company has two separate entities serving North America. Mainline backflow Products (Can) Inc. serves the Canadian market and Mainline Backflow Products (USA) Inc. serves the USA markets. MBP works with all levels of governments in Canada and the United States in a dedicated effort to prevent flooding caused by sewer backups. Our new and innovative product designs have quickly captured the attention of code officials and the plumbing industry across North America making Mainline Backflow Products the professionals' choice for sewer protection.