a question about RV antifreeze - Page 2 - Fiberglass RV


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Old 01-26-2010, 05:35 PM   #15
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Folks, I just got back from checking under the sink basin. Yes, it is only a one inch black plastic hose that fits snugly to a coupler to the outside drain. No P Trap. I also found my problem. The black hose was free of ice and the only place it could have froze up would be the few inches before it exits to the outside. There must be plug of ice there which prevents the sink basin from draining out. Now that I have antifreeze in my vinyl hose lines and the tank (water supply, not grey tank) I guess I just wait until that thaws out or I heat it up. I don't think, with my rig, that I damaged anything....thanks for all your help with this....Lloyd in Ohio
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Old 01-26-2010, 05:50 PM   #16
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The only thing that could be hurt is the fitting going through the wall.

Is there a cap on that fitting on the outside ? It is usually a male hose fitting.

Bill K

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Folks, I just got back from checking under the sink basin. Yes, it is only a one inch black plastic hose that fits snugly to a coupler to the outside drain. No P Trap. I also found my problem. The black hose was free of ice and the only place it could have froze up would be the few inches before it exits to the outside. There must be plug of ice there which prevents the sink basin from draining out. Now that I have antifreeze in my vinyl hose lines and the tank (water supply, not grey tank) I guess I just wait until that thaws out or I heat it up. I don't think, with my rig, that I damaged anything....thanks for all your help with this....Lloyd in Ohio
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Old 01-26-2010, 05:57 PM   #17
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Lloyd, my trailer has a similar hose setup. A couple of times when I've been using the trailer the temperature has dipped down into the teens or 20s, and the drain line has stopped draining. I heated up some water on the stove, dipped a rag in it (wore rubber gloves), and then wrapped the rag around the hose and held it there for 30 seconds or so. Voila!

I'm not sure I would just leave it, because if you have a number of freeze/thaw cycles coming into spring, you might cause damage that is not there now.

Robin, yes, these days you are supposed to catch your grey water. I've seen two different setups on 1970s Bolers:

1) Black plastic hose comes out of sink drain and "disappears" into wheelwell. This just continues on and dumps on the ground under the trailer (you would have to put a basin underneath to catch the water).

2) Hose comes out of sink drain, goes through an elbow, and then goes into garden hose fitting on sidewall of trailer. This way you can either let the grey water drain out and run down the side of the trailer, or you can attach a garden hose and run it away or into a container.

Raya
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Old 01-26-2010, 07:49 PM   #18
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The only thing that could be hurt is the fitting going through the wall.

Is there a cap on that fitting on the outside ? It is usually a male hose fitting.

Bill K
Bill, there is a cap and it is a male hose fitting with a brass screen inside of it. Behind it, I am guessing, is the ice plug.
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Old 01-26-2010, 07:52 PM   #19
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Raya, I will try your trip rather than wait until spring........once I remove the ice plug, should I run antifreeze down the line and then cap it? Lloyd
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Old 01-26-2010, 08:03 PM   #20
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Yes, but....

If you want to add anti-freeze, I would go in the opposite order. The thing is, the "cap" should be the lowest point, so you would have to be stuffing anti-freeze "up" into the pipe.

I would thaw, drain, then cap it. And then pour a bit of antifreeze "down the drain" in your kitchen sink. The anti-freeze should lodge in the low point, by the cap, where your ice clot is now. That should take care of it, and no worries about foaming or off tastes in the spring from that location (assuming you don't drink out of the drain ).

Then just don't pour any more water into the drain until spring, so you don't dilute the trapped anti-freeze.

Or, if you are sure there are no low points (in other words, no place for water to be trapped), you could leave it as is.



Raya

PS: I'm not sure what the screen is for. Is there any chance you are confusing the inlet (where you would hook up a hose for "city" water) for the drain? That shouldn't be the case if you have a male, because the city water inlet should be female, but I'm just wondering because of the screen. Another possibility is that former owners left the cap off for the winter, thereby allowing the drain to be "open" and not vulnerable to freezing, and the screen was to keep pests out. I would think otherwise the screen would clog with the usual sink "debris."
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Old 01-26-2010, 11:37 PM   #21
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Raya, If I remember correctly Lloyd bought his trailer new.
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Old 01-27-2010, 11:08 AM   #22
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Oh, oopsie! Well there's only one problem with that: You can't blame any problems on the "dreaded previous owner," or DPO

Maybe there would be a screen on the sink drain outlet* for some reason I can't think of, but... I can't think of one!

Raya

*meaning, the fitting on the outside wall of the camper; not the sink drain itself.
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