Simpson DuraFlex AL flexible relining for masonry chimney is for
use with natural gas or liquid propane category 1, draft hood equipped
appliances and appliances tested and listed to use Type B Gas Vent. Simpson DuraFlex SS flexible relining for masonry
chimney is for use with wood, gas, pellet, coal, or oil appliances
including inserts, furnaces, boilers, and water heaters.
Follow manufacturer recommendations whenever applicable. Never
use a chimney liner that is smaller in diameter than the flue size of
the appliance it is being connected to. We recommend you study the
brochures to become familiar with the product of choice.
