Collar Uncategorized Jan 19 Preformed flange placed over a vent pipe to seal the roofing above the vent pipe opening. Also called a vent sleeve. C Previous Previous Coefficient of Thermal Conductance (C) Next Next Combined Sewer
Collar Uncategorized Jan 19 Preformed flange placed over a vent pipe to seal the roofing above the vent pipe opening. Also called a vent sleeve. C
