Just a comment on "two bilge pumps.... It is fairly common to install the
second (often larger ) bilge pump a few inches above the "primary and often
smaller " bilge pump. That way, if the first one doesn't handle all of the
water, the second one kicks in and can work in conjunction with the primary.
Of course, if both are connected to the same battery..and that battery is
down, it doesn't matter how many bilge pumps you have. If I had to leave my
boat in a slip, and it had electrical connections, I'd work out a 110 volt
converter to be sure that , if my battery went down, the shore power would
suffice. RichG