We designed our fire tables with both types of installations in mind. If you have an underground gas line, it can be connected inside the cavity of the fire table through the bottom.  All Pyromania fire tables have a supply hose pre-installed and connected to a bulkhead connection which is discreetly located underneath the bottom side. The hose can be disconnected, and the bulkhead fitting can be removed from the body and relocated inside the fire table cavity. Then the hose can be reconnected to the bulkhead fitting on one end and connected to your gas line "stub-up" at the other end (refer to the spec drawing for the opening size at the bottom of the fire table). Once the table is positioned, the hose and the old connection point will not be seen.