For a flue oil system, what is the minimum size of a supply line required?

For a flue oil system, the minimum size of a supply line is crucial for ensuring adequate fuel flow to the burner without creating excessive resistance or pressure drop. A supply line that is too small may lead to operational issues, such as insufficient fuel reaching the burner, which can cause incomplete combustion and affect system efficiency.

The choice of a 3/8 inch diameter pipe or tubing is based on standard practices and manufacturer specifications that ensure a balance between fuel delivery and system performance. This diameter is typically sufficient for residential and small commercial heating applications where flue oil is used, providing the right amount of fuel while minimizing risks of clogging or blockages.

Smaller diameters like 1/4 inch may not accommodate the flow requirements, while larger sizes could be unnecessary for standard applications, leading to increased costs and difficulties in installation. Thus, 3/8 inch serves as an optimal choice for maintaining efficiency and operational reliability in flue oil systems.