FASNSEAL Flex 6 in.
Dia Termination Tee 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. Check installation instructions for restrictions on horizontal terminations, such as minimum distance from windows and doors.p65warnings. UL 1738 and ULC S636 Systems.