generaider
I had the tank made at "Ever-Nu Tank Corp"
They are near you --->3391 NE 6th Terr, Pompano Bch. It was 135 Gal .125 Alum gauge. TIG weld Coast Guard approved. I looked back in my old records and could not find the dimensions. I think you have a 20' seacraft, so your below deck areas are different and smaller. My fresh water tank butts up against the front of my fuel tank and the back of the below deck hatch in front of the console seat. If you need to put a fresh water tank below deck in a tight space I recommend that you use a bladder tank. They will conform to the space. Go to this link---------------->
http://www.onlinemarine.com/cgi-loca....htm?E+scstore. These bladder tanks are easy to install. They are manufactured in Sarasota. West Marine sales them also.If you want some pics, e-mail me and I can try and get what you need.
Capt Chuck