I have a new (to me) boat with a Sealand portapottie and a deck pump out fitting/vent and hoses. Right now the pottie is setup to be carried off and emptied, but I'm thinking about hooking up the hoses to take advantage of the free town pumpout boats/dock where I boat. The problem is I don't know where to start hooking this up and getting it wrong would be, um, unpleasant. I read the manual and it says that Sealand potties can be converted to be pumpable MSD instead of removable type; it doesn't provide much more info than that. Is this a simple matter of attaching the waste and vent lines? I also have no idea how pumpout boats/docks work in terms of proceedures, equipment. Is it basically a giant vacuum that sucks out the waste? Thanks,Brad