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Old 01-21-2019, 03:04 PM   #1
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3 inch sewer hose in sub freezing temps

As a die-hard Sewer Solution user from California now living in very cold Missouri, I've found that the 1" sewer outlet hose tends to freeze easily. I don't own a 3" hose, but may buy one if it will work better in the super-cold situation we are now in.

What's the consensus? Can I use a 3" hose with my grey water valves open to continuously drain my grey tank?

Cold in St. Peters,

Tom
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Old 01-21-2019, 03:21 PM   #2
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As a die-hard Sewer Solution user from California now living in very cold Missouri, I've found that the 1" sewer outlet hose tends to freeze easily. I don't own a 3" hose, but may buy one if it will work better in the super-cold situation we are now in.



What's the consensus? Can I use a 3" hose with my grey water valves open to continuously drain my grey tank?



Cold in St. Peters,



Tom
I would say yes as long as you have a good slope. But why are you leaving your gray tank open? I think it's better to close it until you need to dump, no chance of freezing then...
STAY WARM
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Old 01-21-2019, 05:21 PM   #3
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Draining while freezing...

Thanks Witch Doctor-

I have a TT and the very ends of the tanks are heated but then the black and grey tank valves are exposed and froze last night at 11 degrees. I do have heat tape and insulation around them, but my execution was not very through and so ineffective.

I am thinking if I leave them open and have the volume of the 3" to drain into, there should always be a clear path to the sewer connector.

Slope is important and so I'll need to gin something up for that, but should be doable.

Tom
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Old 01-21-2019, 05:25 PM   #4
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Thanks Witch Doctor-

I have a TT and the very ends of the tanks are heated but then the black and grey tank valves are exposed and froze last night at 11 degrees. I do have heat tape and insulation around them, but my execution was not very through and so ineffective.

I am thinking if I leave them open and have the volume of the 3" to drain into, there should always be a clear path to the sewer connector.

Slope is important and so I'll need to gin something up for that, but should be doable.

Tom
imo you should fix the heat tape and insulation around the valves so they do not freeze . if you hook up a 3" and leave open ice will build up in the hose very fast causing other issues . leaving them closed and only dumping when needed is your best bet .
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Old 01-21-2019, 05:43 PM   #5
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Just my opinion based on being old and experienced: 1) Why is your 1" hose for the Sewer Solution freezing up? Are you leaving some liquid/water in it when you finish or are you "walking" it down to remove any remaining liquids from it? 2) I also disagree with leaving the grey water valve open as it is normally used to flush out the black water discharge after dumping the black tank. 3) Years of experience with using electric heat strip/tapes in industrial settings taught me that you are not "supposed" to wrap the heat tapes around anything. I was taught that winding them around something allows the tape to build up a magnetic field which impedes the tape from properly heating and it does not get hot at all, just warm. 4) I'm thinking that you should buy some of the roll type black foam tape with the sticky back side and wrap the black ABS plastic drain lines with this material. It's quite a good insulator actually. It's flexible to the point that you can wrap the lines from where they protrude from the underbelly, out to the drain valves, around the drain valves and to the connection point. Wind has turned out to be the biggest culprit I have seen with outdoor piping freezing although I'm sure that just pain out really cold will do it also. Good Luck
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Old 01-21-2019, 05:45 PM   #6
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One other trick...

After you drain either the black or gray (or both)...in freezing weather close the valves and then dump some RV antifreeze in there to fill up the exposed pipe.

Worked for me in 2 1/2 months of below freezing temps last winter.

I also agree that it is not a good idea to leave your gray tanks open...even when it is not freezing outside.
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Old 01-22-2019, 02:39 PM   #7
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Flowing water will not freeze. I always leave the gray tank open when hooked up. The only water that flows will be from the shower or sink and will not be in the hose long enough to freeze. It is the same thing with the fresh water intake. We leave the bathroom sink turned on, more than just a trickle, the water is always moving as well as the water that is being constantly drained from the gray tank. Fifteen years on the road early spring at Yellowstone for eight years, Rock Mtn and Grand Teton. The only times (twice) is when I forgot to turn the water in th esink on at night (now have a sign on the bathroom mirror
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Old 01-22-2019, 03:14 PM   #8
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When I was living/working in Illinois for 2 1/2 years, I bought a rubber converter and then hooked up 3 inch PVC pipe for the drain. Never had a problem with freezing. Kept the black tank closed except for emptying, left the gray water open all the time since it was mostly hot water from the shower or doing dishes. No heat tape on the valve and it never froze up - even in -30 below weather. I usually emptied the black tank on sunny days so it was not likely to be frozen. The antifreeze is a great idea also, I had other chemicals in mine so it probably served the same purpose. The most important thing was to keep the wind out as that would freeze anything in a few minutes. Had to skirt the RV in winter and keep the heat going.
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Old 01-22-2019, 04:33 PM   #9
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Just don't do it with the black tank; you can end up with a 3" poopsicle. And yes, I write with experience.
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Old 01-22-2019, 04:34 PM   #10
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Flowing water will not freeze. I always leave the gray tank open when hooked up. The only water that flows will be from the shower or sink and will not be in the hose long enough to freeze. It is the same thing with the fresh water intake. We leave the bathroom sink turned on, more than just a trickle, the water is always moving as well as the water that is being constantly drained from the gray tank. Fifteen years on the road early spring at Yellowstone for eight years, Rock Mtn and Grand Teton. The only times (twice) is when I forgot to turn the water in th esink on at night (now have a sign on the bathroom mirror
Flowing water will freeze . depends on temps if it's cold enough in the teens or less .
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