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Posted by HeatPro on September 27, 2007 at 15:32:30:
In Reply to: Re: Main Vents posted by Boston on September 27, 2007 at 14:48:45:
Bad design. Extend the short main and add a vent beyond the last radiator branch 1-1/2 feet from the end. Same with the other main. Gurgling is water thrown from main and bad return.