Water Tank

Details
Capacity: 600 liters
Location: The water tank is integrated into the hull beneath the saloon table
Fill: Base of the mast
Vent: Inside of mast locker
Tank access: Behind the starboard side settee back

Upgrades
Some cruisers have installed a shutoff valve on the vent line to prevent salt water from entering the fresh water tank during rough seas

History
From Mark Hardesty, "Seawind has tried several solutions to the water tank over the years. Some problems have resulted from knot heads over pressurizing the water tank by filling more rapidly than the air vents can handle, basically blowing the tanks up. Some problems have occurred by (in theory) having the tanks quite full and pounding into seas, either oil canning the tank or perhaps by inadequate baffling. In any case, Seawind for a while offered a roto-molded tank insert, but abandoned that approach around 18 months ago for a multi-part composite tank assembly that fits in the cavity formed by the lower hull mold section and the above structure."

Design Issue
There is a structural design issue with the earlier models. The tank is actually made from the hull mold forming the base and walls and the floor forming the lid. Tortional forces result in the tank leaking at about the 300-400 liter level. Later models have a separate tank placed in the position with its own roof.
If the water tank is overfilled or when sailing in rough conditions it is possible for the water tank to crack and leak water. The repair is major, requiring cutting out the floor and repairing the damage.

Leaking water tank repair
Repair to leaking keels: File:Repair Water Tank Leak.pdf