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wifi · 08-14-2009, 03:10 AM

Improper venting, especially if its an old system. These days every appliance needs its own vent connected to the vent stack.

08-14-2009, 03:10 AM	#2
wifi Senior Member Join Date: Jul 2007 Location: Lakes Region Posts: 1,321 Thanks: 282 Thanked 287 Times in 169 Posts	Improper venting, especially if its an old system. These days every appliance needs its own vent connected to the vent stack.