[Islandtrader]

If you look at the tanks some place near the filler there should be a plate or sticker that tells when they were made.

As far as the blower, think of it as a vacuum cleaner. It's job is to suck the air out of the bilge. So one end of the hose should be in the low part of the bilge and the other to an exit point. The other hose is to allow circulation while the boat is running under power. That way the blower is not on at all times. The bilge air is then removed by a venturi process. Hope this helps.