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Topic Closedslow drip from insulation around low point drains

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lostagain View Drop Down
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Direct Link To This Post Topic: slow drip from insulation around low point drains
    Posted: 22 Sep 2020 at 12:02pm
+1 to disconnect the line if it's in danger of freezing.
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Direct Link To This Post Posted: 22 Sep 2020 at 4:58pm
Originally posted by offgrid

If you're concerned about the pump feed line freezing it might be better to just disconnect it than to try to apply pressure to the tank. I'm not sure how pressure would do better than just adjusting the tilt of the trailer and draining the tank anyway. 

Originally posted by lostagain

+1 to disconnect the line if it's in danger of freezing.

 

Good advice, thanks.  I'm never fond of disconnecting and reconnecting fittings, but if it'll avoid further damage, I'm willing to do it.

 

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Direct Link To This Post Posted: 22 Sep 2020 at 9:12pm
If you empty the tank and run the pump until it is just pulling air, there will not be enough water in the line to freeze. Then use the winterizing valve and hose to pump RV antifreeze through the lines. That will get the water that just air seems to miss. Be sure to bypass the water heater first. Drain the water heater by removing the anode rod after relieving the pressure. I use the air/RV antifreeze combo. This makes absolutely sure my pump and the various valves are protected from damage. Getting rid of the RV antifreeze residual taste in the spring is not that difficult. After sanitizing with bleach, follow it up with baking soda dissolved in water. That will go a long way to get rid of the odor and taste.
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Direct Link To This Post Posted: 23 Sep 2020 at 6:28am
I can see getting water back in the pump suction line if the trailer is moved and ends up tilted toward the suction line after the tank is drained. Might want to get that end of the tank lower when you drain and then park it level afterwards. 
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Direct Link To This Post Posted: 23 Sep 2020 at 8:31am
I was just outside (in the rain) and i think (i hope) i caught the source of the leak above the low point drains. The ac outlet outside needs to be caulked- water was dripping down the wall inside and maybe finding it's way to the low point drains insulation and dripping to the ground.
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Direct Link To This Post Posted: 23 Sep 2020 at 8:38am
Sounds like you found it, that's great. 
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Direct Link To This Post Posted: 23 Sep 2020 at 8:41am
StephenH "(If you empty the tank and run the pump until it is just pulling air, there will not be enough water in the line to freeze. )" Will this burn up the pump, running it dry with no water to source?
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Direct Link To This Post Posted: 23 Sep 2020 at 9:59am
Originally posted by Poddy

StephenH "(If you empty the tank and run the pump until it is just pulling air, there will not be enough water in the line to freeze. )" Will this burn up the pump, running it dry with no water to source?
These pumps can run dry without damage. as they use a flexible diaphragm for pumping, not a metal-on-metal piston. I wouldn't run it for extended periods, but for the brief time I suggested, it will not cause any damage.
 
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Direct Link To This Post Posted: 26 Sep 2020 at 10:37am
Maybe add half a gallon or so anti freeze into fwt, then run the pump to suck it into the line, should be good. You gotta sanitize the fwt in the spring anyway. 
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Direct Link To This Post Posted: 05 Oct 2020 at 1:30pm
I have an in and an out valve at the water heater.  I also have a inline valve that goes to a short piece of plastic tubing that goes nowhere. what is this third valve for? I just purchased a 2018 180. 
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