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Old 10-26-2014, 03:21 PM   #1
Join Date: May 2014
Location: Stagecoach, NV
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Air pressure method of winterizing

I was reading about different methods of winterizing (185RB), one being using air pressure through your city water connection. I have the little goodie to do this but I am puzzled by something. The manual says that once you start the pressure it takes 5-10 minutes to clear the water. Is this right? Another thing is, What PSI should I have on the compressor to avoid damage to the system. As far as the toilet do I have to hold it open during the whole process?Looks like this is a two person job?? Bungee cord??? Thanks in advance for any thoughts on this.

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Old 10-26-2014, 04:06 PM   #2
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Set your regulator to 30-40 psi and blow away. I simply plug my air supply into the city water fitting and step on the toilet pedal until no more water comes out. Then I do the sink faucets and then indoor/outdoor showers. No need for a helper.

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Old 10-26-2014, 04:09 PM   #3
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PSI = about 20 - 30 psi. I hook up the air compressor after I drain everything including the hot water tank (you may have to put back the plug). I crack open each water valve one at a time until they blow only air which is not long, maybe 5 - 10 seconds if that. Be sure to do your outside shower if you have one and low point drains. Do the toilet and dump all your holding tanks. I then put some RV anti-freeze down each drain (p-traps) and also dump some into the toilet bowl. This keeps the seal from drying out over the winter.
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Old 10-26-2014, 05:32 PM   #4
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You need a compressor with a tank so that you get enough air flow to blow out the water. The little 12 volt tire inflators won't do the job.

I blew mine out this year and used half as much antifreeze as I needed last year, without blowing, to get the job done.
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Old 10-26-2014, 05:42 PM   #5
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The little 12 V compressors work just fine. You don't want much psi anyway. Just connect to the fresh water fill. Bypass and drain the water heater, drain the fresh water tank, open and drain the low point drains, and then close all the faucets and the low point drains. Turn on the compressor and then open each faucet one at a time. When that one blows air, do the next one. Don't forget the outside shower and the toilet. I go around for a 2nd time just for the heck of it. When you finish with the last valve, shut off the compressor. Then dump some pink stuff in each sink drain and a little in the toilet bowl. You're done. A gallon on the pink stuff will be more than enough. I keep a gallon handy just for emergencies. I use the TT as a man cave so the ptraps and toilet might need a redo.

Note: a slight bit of water in a line won't hurt anything. The lines are plastic and there won't be enough to crack them if you have followed the above steps.
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Old 10-27-2014, 11:47 AM   #6
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Thanks for the helpful answers.
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Old 10-27-2014, 01:11 PM   #7
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When you blow your lines out with Air, Do you all use RV antifreeze after? I have never done the air method but thinking about it this year.

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Old 10-27-2014, 01:19 PM   #8
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I work for the Department of Redundancy Department.
I blow the system out then pump in the red stuff.
When it comes to something so important and a system that would be so hard to repair, I'd rather spend the time and money on the front end instead of on repairs later.
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Old 10-27-2014, 01:30 PM   #9
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I do, because it's Minnesota....but it is like wearing a belt and suspenders. I blow out my lawn sprinklers using air, and they never freeze and crack, same idea with the trailer. Once the water is blown out, there isn't anything to cause significant pressure when frozen.
It's actually the air pressure buildup in pipes caused by the expanding ice that makes pipes burst. Hence why you're also advised to leave a faucet open, to give the air someplace to go. So blow out the water, and then leave the faucet open where possible, and you are good to go!
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Old 10-27-2014, 01:49 PM   #10
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I drain the water heater, remove the outdoor shower hose, open all taps and blow out the lines. I only use the antifreeze in the drains. You need to make sure that all sink drains and shower drains have pink stuff in them. They have elbow traps.

I can do this in about 20-30 mins and might do it 4 or five times over the winter depending on making trips when the weather turns nice for a few days.

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