For all of those models, we recommend a 1" natural gas line for pipe runs between 20 - 50 ft. For longer runs, a larger pipe will be required. The inlet connection on the generator itself is 1/2" and would be reduced from the main pipe when connecting to the flexible fuel line provided.
For more detailed information, please contact an authorized Generac Dealer located near you. Use our dealer locator at http://www.generac.com/Service/Deal...
answered 2 years, 3 months ago