Originally Posted by Wjpetersen
I think it is an accumulator tank. The problem is that I can't find the same one online. Also, it is in a space that only a midget would fit it. I am going to see if I can reach around with a bicycle pump and put air in it. See if that solves the problem.
if your pressure water from the pump works fine, and the shore water fails it's not going to be the accumulator tank. All the accumulator tank does is smooth our the flow from the pressure pump.
Again, like I said before, you have a regulator
that is either undersized or clogged. Replace the regulator (or repair it if it's one of the nice bronze ones), or use the tank water and have no chance of sinking the boat with the garden hose.