What is the size of the gas inlet connection on HOTTAP? Mac Slodyczka June 07, 2017 06:44 Updated Follow The Gas Inlet on the HOTTAP is a 3/8" SAE fitting. Related articles How does the HOTTAP handle Outback Roads & Corrugations? What size gas bottle can I use? Can I wire the HOTTAP direct to a 12V Supply? What comes with your HOTTAP Outing Can I use the HOTTAP on my River Boat, and can I attach it to my existing plumbing? Comments 0 comments Please sign in to leave a comment.