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Frozen holding tank - Problem?

So, I am scheduled for haul out today. Normally the procedure is to stop by to dock for a quick pump out first. I have a feeling that won't work this year with today's temperature of 15F / -10C. So it looks like I may have a block of crap in my tank for the winter. What catastrophe I am in for? Another option may be to reschedule to next week when it's above freezing.
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Re: Frozen holding tank - Problem?

Shouldn’t be a problem unless the tank is full and it splits. These tanks are strong to resist the pressure from pumping stuff in to them when the vent is clogged. I think you should be ok.


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Re: Frozen holding tank - Problem?

Silly Question ...Can't the yard pump it out for you? or reschedule.
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Re: Frozen holding tank - Problem?

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Silly Question ...Can't the yard pump it out for you? or reschedule.
They don't have mobile pumps that I am aware of. Only at fuel docks.
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Re: Frozen holding tank - Problem?

Do not panic. Usually the water temperature insulates interior "liquids" to a degree. It's when the boat is pulled out that the big freeze begins. For the time being you could flush a jug of heated RV antifreeze into the mix. Maybe setup an electric heater ABOVE the tank level. If it's cracked, thawing it out could pose a shock hazard as well as a sh*t show so keep an eye on it. If you want to do a trial run borrow your neighbors shop vac and hook it into your deck fitting. It's an old northerner trick that does work in a pinch. Good luck

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Re: Frozen holding tank - Problem?

Buckets could be an option.
Id probably go ahead and spring for lids too...
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Re: Frozen holding tank - Problem?

I assume you’ve already ruled out getting a heater in there and warming up the tank beforehand? Perhaps dumping antifreeze in on top of the crap might be a good idea — you probably have to do this anyway to protect the head valves.

It’s probably not a problem as long as the tank isn’t very full, but personally I’d feel a lot better getting it out.

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Re: Frozen holding tank - Problem?

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I assume you’ve already ruled out getting a heater in there and warming up the tank beforehand? Perhaps dumping antifreeze in on top of the crap might be a good idea — you probably have to do this anyway to protect the head valves.

It’s probably not a problem as long as the tank isn’t very full, but personally I’d feel a lot better getting it out.
I've only got 4 more hours before haul, so a heater may not cut it. It's possible it's not frozen, (haven't headed to the marina yet). Given the snow and ice on the docks, I wouldn't be surprised if they stopped doing pump outs for safety reasons. Still 150 boats in the water. I'm sure possible frozen slings on the travel lift don't make them happy either.
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Re: Frozen holding tank - Problem?

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I've only got 4 more hours before haul, so a heater may not cut it. It's possible it's not frozen, (haven't headed to the marina yet). Given the snow and ice on the docks, I wouldn't be surprised if they stopped doing pump outs for safety reasons. Still 150 boats in the water. I'm sure possible frozen slings on the travel lift don't make them happy either.
Yuck. I hate hauling out in the snow and cold. One of the joys of Canadian boating...

Four hours might be enough time to warm up the muck. But as you say, they may have already shut off the pump out plumbing.

Good luck with it all.

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Re: Frozen holding tank - Problem?

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Originally Posted by MikeOReilly View Post
Yuck. I hate hauling out in the snow and cold. One of the joys of Canadian boating...

Four hours might be enough time to warm up the muck. But as you say, they may have already shut off the pump out plumbing.

Good luck with it all.
How about putting antifreeze into the holding tank.


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