I chose the SeaFlo 43 because it has the same quick disconnect fittings at the OEM pump. I still replaced the quick disconnect fittings on the hoses (as they had o-rings on. Easier to replace the fitting than replace just the o-rings). Quick tip... When you tug on them they'll be stuck. Use a heat gun to soften the hose and they'll pull right out, easy. And It doesn't take much heat.
The SeaFlo 43 product description says no accumulator needed. I decided to start with the pump as I could always add the accumulator later. Now that it's installed and tested, it's fine. We have solid water pressure and quiet operation without an accumulator.
One other tip... make working on it easy. Remove the lower cabinet door (take the door off at the hinges). Then you can lay down in front of the pump and easily work on it without the doors in the way.
The job is one of the easiest projects on the boat I've done.
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