I am Looking for a 10 micron filter for my Oday 28 fuel system and found something interesting. The 120RMAM filter assembly I have has a 30 micron filter (R12SUL) which is UL approved. I want to go with a 10 micron filter so I call Racor and they said they have a R12T Filter (Notice No UL in filter number) that will work with the 120RMAM Filter assembly but it is not UL approved. I don't want to purchase this filter if a UL appoved filter is required. Does the US Coast Guard require all fuel filters on boat engines to be UL Approved?