So I find the threaded barb end to the regulator is 9/16" NOT the 3/8"!! The valve side with the hand-tightened knob fits fine. My pup is a 2012 so what gives? Must be a reason that is the standard equipment size, both hozes are 1/4" I.D. Thank you realebill for the Sturgis products site- the hose I am replacing is also a Sturgis, but they don't list any with that size barb end! Other than a fabber shop (miles and miles away) any suggestions? In any case, I tested the propane operation of the 3 way frig and it works great, much colder than on the A.C. mode and I set it on medium. Thanks again to everyone, this is a great informative site! I love my pup, I don't envy much those big motorhomes, this is nice and cozy and economical for my family- we plan on extensive use this summer so I want to prepare early. Like you, Wiscampsin, I am not crazy about using the stove so near the pup, so I take a Coleman stove I can setup more remotely and it is a good simple backup. I had a full 20 gal. tank to begin the season last summer, and we used the pup stove a lot, and it still has a lot of gas.