A technician told me I can simply connect a grill to gas line without any need for tapes. I connected our grill to the gas line without using any tape for isolation. I ran the soapy water test and there was no bubble. The grill was working fine. I am still worried about the leak. Is it necessary to disconnect the grill from the gas line and use tape and redo everything? or is it OK since there was no bubble formation in the soap and water test.
I have put the connection image below.