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Star Tribune Names Uponor North America to its Top 100 Workplaces for 2013

Uponor North America (Uponor) has been named one of the Top 100 Workplaces in Minnesota based on an employee-based survey project from the Star Tribune. Uponor was ranked 16th ...Read More

LOCHINVAR® CELEBRATES WINNING VIP CONTRACTORS AT 2013 CMA FEST

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InSinkErator Gives Professionals Features that Make New PRO Series the Industry’s Most Powerful Disposer Line

Homeowners expect the best, and when it comes to food waste disposers, plumbing professionals can deliver. InSinkErator® is launching a new PRO Series® line of disposers in July, and they’re ...Read More

Article Categories / Resources / The Library / Older Steam Heating Systems

Vacuum Valves for Winter Profits

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Published
July 27, 2009 Download PDF Subscribe to RSS feed

This William Moore article from a 1935 edition of Fuel Oil Journal does a nice job of explaining how vacuum vents once worked on one-pipe steam systems.