What is the size of the gas inlet connection on HOTTAP? The Gas Inlet on the HOTTAP is a 3/8" SAE fitting. Related articles What size gas bottle can I use? What comes with your HOTTAP Outing How does the HOTTAP handle Outback Roads & Corrugations? Can I connect my HOTTAP to a bayonet fitting? Can I wire the HOTTAP direct to a 12V Supply? Comments 0 comments Please sign in to leave a comment.