Holding Tank and Winterization - SailNet Community

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  #1  
Old 10-24-2007
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Holding Tank and Winterization

Good Day All!

I had my Holding tank pumped out, and then just before the boat was pulled from the water, I learned that my family decided to use the head. Grrr.

I am told it was only #1, however in your collective experience, with maybe 2 flushes of the system and a 28 Gallon Holding tank, could I cut a corner and just add the pink stuff to the system.

Obviously, as I am saying "Cutting Corners" I know I shouldn't do this, and I know the concept of a boat = pit in the water to which you through money.

However, their charges to pull the waste once the boat is on land is 150$.

I am doing the physics of at most 1 gallon of water waste in a 28 gallon space and the cost of adding 2 gallons of pink stuff versus 150$ for a pump out.

Thoughts..

Ian Lyons
Sea Lyons
2002 Hunter 326
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Ian Lyons
Sea Lyons
Hunter 326
Narragansett Bay
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Old 10-24-2007
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I use my head all winter (#1 only if possible) during the weekend projects and simply flush with the pink -50 stuff or the blue -100 stuff.
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Old 10-24-2007
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k1vsk will become famous soon enough
The propylene glycol, aka the pink stuff, is not intended to be mixed with water as it's efficacy is diminished significantly - it is not a linear relationship between dilution and temp protection.
It's a moot point in that a couple of gallons has enough room to expand upon freezing such that no damage will result. The tank does not need to be empty nor would it ever just by pumping it.
What you do need to do, depending on the toilet, is follow the mfg recommendations for winterization. some toilets must have antifreeze pumped through them to displace trapped water; some only require dry pumping.
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