Re: OMC Dual Line Fuel Tank Pick-up tube Home › Forum › Ask A Member › OMC Dual Line Fuel Tank Pick-up tube › Re: OMC Dual Line Fuel Tank Pick-up tube garry-in-michiganLifetime MemberReplies: 3583Topics: 31 June 7, 2018 at 2:33 am #77574 A single line tank doesn’t have any valves. The valves are in the primer bulb in it’s fuel line. . . 😎