Friday, August 6, 2010
Water Tanks revisited....
The Whitby 42's water tanks consisted of a hull liner under the deck in the saloon, with a riveted and gooped in place aluminum lid placed on top. There were two tanks, port and starboard. Naturally these tanks, after 30 years have some issues. They leak around the rivets and in some places in the hull liner. TIH tanks had also developed some interesting aluminum corrosion blooms.
For some reason I thought today, when it was 95 degrees below decks (with the Mickie Mouse air conditioner running full blast) would be a good day to tackle the starboard tank.
First use the existing inspection hatches to remove as much of the top lid as possible. A Sawzall works well for this. With a little effort you can remove all of the center of the lid from the forward edge to the after one. The next problem was removing both riveted edges.
Having seen what Bob Cambell did to the center fuel tank with a few come-a-longs I decided to revert to using mechanical advantage. A few cranks of the 1 Ton hoist and the sides popped right out.
This is the cleaned out liner. The two raised pieces are the chocks for the baffles which can be ground off as necessary. The approx dimensions 46" long X 20" wide X 12" deep which should give me approx 50 gallon capacity per tank (two tanks). This will leave me a 22" long space forward of the tanks for pumps etc. I may use two smaller tanks per side for ease of installation.
I may also add another 30gall tank behind the settee on the port side for more water storage and as ballast as the boat has a slight starboard list.