What should be done to the vent connector before connecting to a fireplace flue?

Before connecting the vent connector to a fireplace flue, it is essential to permanently seal the fireplace flue opening. This is crucial for ensuring that the exhaust gases from the vent connector are directed properly through the flue and do not escape back into the living space. By sealing the flue opening, you minimize the risk of carbon monoxide or other harmful gases entering the home, enhancing the safety of the operation.

Additionally, sealing the flue prevents any possible backdrafts that could impede the venting of combustion gases from the appliance. It solidifies compliance with local codes and manufacturer instructions, ensuring the system works efficiently and safely. Properly preparing the vent connector and flue system is critical for optimal performance and safety when using propane appliances in conjunction with a fireplace.