Can I use a 20-lb propane tank with a tabletop unit? November 13, 2020 20:23 Updated Yes. With a Propane Adapter Hose with Regulator, you can connect your tabletop griddle to a bulk 20-lb propane tank. Related articles Can I use a Propane Tabletop Griddle indoors? The flame on my griddle is low or isn't producing enough heat Do you have a natural gas conversion kit for tabletop griddles? Where can I buy… Where can I find the serial number?