What should be ensured about the connector in relation to the masonry chimney inlet?

The importance of ensuring that the connector does not pull out of the inlet of a masonry chimney relates directly to safety and functionality. A secure connection is essential for maintaining the proper drafting of combustion gases and preventing the escape of harmful fumes into the living space. If the connector is not firmly attached, it could lead to leaks, which can pose serious health risks due to carbon monoxide exposure, as well as potential fire hazards. Ensuring that the connector remains in place enhances the reliability of the ventilation system and promotes the safe operation of heating appliances.

In contrast, using wood as a connector would not be appropriate due to the potential for combustion and lack of durability under high temperatures. Having the connector extended beyond the wall of the liner could create complications in the alignment and sealing, risking leakage. While insulation can be beneficial in reducing heat loss, it is not a primary concern regarding the immediate integrity and safety of the connection between the connector and the chimney inlet.