Can you help me find USCG regulation or guideline for fuel fittings. This is for pleasure boats. It is referenced in ABYC standards as being in USCG Compliance Guidelines, but I can't locate said Guidelines document. Specifically I need to know how long the hose barb needs to be, for various sizes (diameters) of hose. I know it has to accommodate 2 hose clamps. I just need to know how long that works out to. Thanks. --- Ann