My current fresh water pump pump just died.. ok not completely.. it
pumps about a gallon an hour. It was an old pump and I guess it served
it's time..

The new pump I like to buy is an Auto Sense type. It does not need a
pressure switch like (I assume) the old one needed. Can I without any
problems replace the old pump with a new one? Or do I need to rip out
the accumulator tank and pressure switch?

Thanks,
Ronald.