The O rings are easily replacecable. It's like .58 cents per 3-6 O rings. Part number at Lowes is BrassCraft # 0533. The size is 1/4"ID x 3/8"OD x 1/16" Wall Thickness.
You're dealing with rubber O rings and pressurized gas, overtime it's going to wear out.
Thanks for the part numbers. That makes it a ton easier. I'll pick some up tonight and also continue to tape the threads every fill up anyways. Might as well double up on leak prevention.
Yeah, I expect things to wear. But after a little under two months of use? Eh...probably just the cheapest O-rings the company could find. Wouldn't surprise me if they were "old stock" to begin with.