Nope, you can connect the pump to the top to empty. All three of the holes in the sac are threaded. In the package there are two plugs and one adapter with the Fly High quick connect. You can choose which to put where based on your application. When emptying, just put the pump onto the quick connect on the sac. You might have to push down on the pump to get it to start sucking water, but it will usually just start going.
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