What is one important characteristic of the inlet thimble mentioned for masonry chimneys?

The inlet thimble for masonry chimneys is a critical component that facilitates the safe and effective transition of flue gases from the appliance to the chimney. One important characteristic of the inlet thimble is that it should prevent the connector from pulling out. This characteristic is vital for maintaining the integrity of the chimney system, ensuring that the connector remains securely attached under various conditions. A properly secured connector mitigates the risk of flue gas leakage, which can pose safety hazards.

When the connector is properly held in place, it contributes to the overall safety and efficiency of the chimney system, as it prevents any potential disconnection that could lead to dangerous situations. This characteristic is essential for compliance with building codes and standards that prioritize safety in chimney installations.