Answer
Mar 10, 2026 - 02:01 PM
For a 300,000 BTU pool heater, you typically need a 1-inch diameter gas line if the run is up to about 40 feet using natural gas. For longer distances, or if using propane, a larger diameter line (such as 1¼ inches) may be required. Always consult local codes and a professional installer to ensure proper sizing for safety and efficiency.
