Fresh Water tank winterization?

sr360aft

New Member
Nov 13, 2005
142
Knox Vegas, TN - RSM, CA
Boat Info
36' aft cabin
Engines
Twin Merc 350's
I don't wintarize but since I don't spend a lot of time on the boat during the Dec-Feb time frame, the freshwater system doesn't see much use. This season I put in bleach before the first outing and the fresh water was great but only after flushing several times (120 gl tank). Is there something else I can use that doesn't require flushing, more of a maintenance additive?
 
There are several water sanitizers you can add to your water tanks that will keep your water system clean while not in use. There are odor free and wont require you to flush the system before you use it (you may want to anyway but its no where near as offensive as bleach). The one i use is clear and it takes 1 ounce of sanitizer per 10-20 gallons of water. You may need to add a little over the winter months. Hope this helps

Mike
 
I've used AquaFresh with good results for many years. In the spring time I add a heavy dose per the instructions on the label and put very little water in the tank. I let it sit in the tank for a couple of days after I run the treated water through the cold water lines including the ice maker. I make about 20 pounds of ice with that water and throw away the ice cubes. After 2-3 days, I fill the tank up and flush it out. I throw away the ice from this water as well. I repeat this two more times, flushing the water system until it sputters. I then fill the tank up, make some ice, toss that and then we are good for rest of the season. I do make sure the water tank is completely used each week, which is pretty easy. If we don't use it for showers and ice, I wash the boat and then refill it. With this rate of use, we do not add AquaFresh again until we are done cruising in October. The only exception is I add treatment to the tank if I feel the water supply at a certain marina is not reliable. That is very unusual in the Great Lakes where we cruise.
 

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