Capillary Tubes

If you transport Insulating Glass units from low to high altitudes, or vice versa, install these Capillary Tubes into the spacer frame to equalize pressure.

it has to do with let's say you live in the Chicago land area and you want to get Windows in Denver well there's a problem getting windows from point A to pointb.when you're going up an elevation at a certain level cap tubes and breather tubes are used in insulating glass units to equalize the pressure between the sealed panes the main reason for the use of capillary breather tubes is for installation of windows at high altitudes when a sealed insulating glass unit is constructed at low altitudes and then installed at higher altitudes such as Denver the resulting increase in altitude causes the glass paines to bow out have a pillow shape appearance the glass blows out because the sealed pressure at the time of assembly is greater than the pressure incurred at the higher elevation if the pressure changes large the insulating glass panes can fracture and or the sealant holding the glass panes can rupture causing premature seal failure.A capillary tube (sometimes called a “breather tube”) is a narrow tube that is inserted into the spacer between the two panes in a dual-paned window. The capillary tube equalizes the pressure inside and outside the sealed unit.
A capillary tube (sometimes called a “breather tube”) is a narrow tube that is inserted into the spacer between the two panes in a dual-paned window. The capillary tube equalizes the pressure inside and outside the sealed unit.