Red58, Hmmmm. I measured my tank's inlet with a caliper. It is 1 1/4" i.d. and 1 3/8" o.d. When I spoke to the guy, we were discussing an item that is for gas filling and he said that it should go over my inlet. But I imagine he has never done it himself. I understand from you that it will not happen. Are you suggesting that I go with a filler hose that is 1 1/2" i.d.? That is going to mean that I have 1/8" to close up with a hose clamp. If gas hoses are as stiff as I am given to understand, I wonder about the sufficiency of the seal that I will get. I have not found gas hoses with i.d. of 1 3/8" for a more precise fit. Maybe they have escaped my online searches. I will search again. Otherwise, I will have to get the vendor of the 1 1/4" i.d. hose to agree to take it back if I cannot get it onto my 1 3/8" o.d. inlet. He seemed so confident that it would not be problem.

I am wondering about an alternative method: Maybe go with steel or aluminum pipe that is 1 1/4" o.d., grind off a few thou from its o.d., insert it into my tank's inlet, and then use hose with hose clamps to seal that. If that was clear, what do you think?

The tank I have seems to be the tank that many have installed under their beds. It may be that the manufacturer intended all plumbing to be welded. I know I have seen plenty of radiator hoses being used for these connections. Apparently, it is hard to find the gas hoses with the needed size. -Alden

Last edited by Alden B.; 08/02/2014 3:32 AM.