Fresh water winterization - SailNet Community
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post #1 of 5 Old 12-17-2012 Thread Starter
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Fresh water winterization

I winterized my fresh water system yesterday and found that on my new boat I can no longer blow the system out with compressed air as I did on my last boat. (I recently posted on this also, under Atlantic Marine Hot Water Tank). Alternatively, I used antifreeze. It took over ten gallons to do it. Cant this stuff be cut with water by 50% or 33%? My boat stays in the water and the water is brackish saltwater off NY Harbor in NJ. It rarely goes below 0 here and the water will never go below 32. Does anyone else do this?

Dr. S.
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post #2 of 5 Old 12-17-2012
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Re: Fresh water winterization

I just pump the pink stuff through untill it comes out the faucets. It only takes one hard freeze even though it seems we may never get one this winter.

My boat takes allot because I don't by pass the HWH. I did find however, I can use less AF by first draining the HWH and closing the TP valve so the AF flows in and out but makes an air bubble in the tank.

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post #3 of 5 Old 12-17-2012
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Re: Fresh water winterization

Drain and bypass the hot water tank. Then it'll take less than one gallon of AF.
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post #4 of 5 Old 12-17-2012
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Re: Fresh water winterization

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Originally Posted by Dcneuro View Post
I winterized my fresh water system yesterday and found that on my new boat I can no longer blow the system out with compressed air as I did on my last boat. (I recently posted on this also, under Atlantic Marine Hot Water Tank). Alternatively, I used antifreeze. It took over ten gallons to do it. Cant this stuff be cut with water by 50% or 33%? My boat stays in the water and the water is brackish saltwater off NY Harbor in NJ. It rarely goes below 0 here and the water will never go below 32. Does anyone else do this?

The pink antifreeze that is generally available is already cut 4:1 with water. so no, not really. Although the water stays at 32F, the cabin most likely sees mid-20s on several occations.
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post #5 of 5 Old 12-18-2012 Thread Starter
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Re: Fresh water winterization

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Originally Posted by Vasco View Post
Drain and bypass the hot water tank. Then it'll take less than one gallon of AF.
Therein lies the problem. I could not get it to drain. Disconnected both the inlet and the outlet, left a faucet open for air, even used compressed air. Blowing in the inlet got about a gallon of water out of the outlet, but not enough as it is uphill and just bubbled. There must be some sort of check valve as blowing in the outlet just built up back pressure. Don't know why a check valve would be in there.

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