I have four hoses in the sump. livewello drain, bilg pump. livewell fill line. all 3/4. And there is one that is a 1 1/2 and I have no idea what it is. This question is prompted by a leak somewhere as indicated by the bilge pump coming on ever forty minues to an hour. I replaced the splash rail drain and believe that isn't the problem. I would welcome any direction to correcting this problem without removing three batteries and a oil resivor