A typical refueling will send up to a half gallon or more of fuel spilling overboard. USCG and other regulations prohibit the discharge of oils including civil and criminal penalties.Installed in the fuel tank vent line, the Racor Fuel/Air Separator efficiently separates air from fuel forced into the line. Air is vented, and all fuel is returned to the tank. The Fuel/Air Separator captures fuel normally discharged due to agitation and thermal expansion up to 2.4 PSI. It also eliminates damage to expensive striping and labels and protects finishes from fuel stains. The unit is maintenance free -- there's nothing to rust or corrode.Fits neatly into your vent line, actually replacing a section of the line. One Fuel/Air Separator unit is required for each vent line. Hose barb: 5/8".LG100: (17 CFPM max air flow, Size: 9-3/4" H x 4" dia.)Stage One - Venting tank fuel is deflected by the flow diverter and fuel is directed down to the drain ports. Air is allowed to bypass and continues out.Stage Two - Fuel defoams through a fine wire mesh screen which filters out largecontaminants. Under the screen, the fuel collects temporarily until it can flow back down to the fuel tank. Stage Three - Vapor collects on the interior surfaces and coalesces. The fuel returns downward by gravity and air continues out. The safety relief valve includes a floating check ball which will not permit a large in-rush of fuel to bypass. In the event of internal pressure reaching 2.4 PSI (0.17 bar), the spring will compress and open the safety seat.
