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 6, 2018 at 4:34 pm #77537 Yes – that disk is a check valve and should rattle when shaken. . . 😎