FASNSEAL 3 in. Dia Wall Thimble w/ AVL

Use for through-the-wall termination. Fits between standard wall studs. 3 in. to 5 in. diameters accommodates wall thickness of 4-1/4 in. to 8-1/2 in. diameters accommodate wall thickness of 5-3/4 in. to 11-1/2 in. AVL pipe allows for adjustability in length variance. FASNSEAL is for use with natural gas or propane Categories II, III and IV appliances or Canada's Type BH Gas Vent Systems, having a maximum rated operating temperature of 480 degree F and a maximum positive pressure of 15 in. (FASNSEAL Flex 6 in.) water column.|FASNSEAL can be used on a wide range of applications, including: high efficiency gas boilers, furnaces, booster heaters, pool heaters, water heaters, unit heaters, or tankless water heaters|Patented built-in mechanical locking band and triple-lipped directional gaskets|Engineered with smooth clean welds located 90 degree from mechanical locking bands|All FASNSEAL components which come in contact with exhaust gases and condensates are now silicone free, important design and manufacturing feature greatly reduces the chances of system breakdown and failure|Welded seams ensure a leak-free product that is meant to last