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Old 12-30-2016, 04:29 PM   #1
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Winterizing question

I've read all the postings I could find on winterizing an have a question that I have not seen covered. I hooked up my compressor to the city water inlet at 40psi. Everything went as expected. I had read somewhere about pumping some AF into that line to protect against any freezing in the built in pressure regulator. I bought one of the Camco hand pumps designed for this, but could not get the city water inlet to accept any AF. I tried hard enough that the hose popped off the Camco pump. I used the pump to push AF through the black tank flush hose without any problem. I had a faucet open inside. What did I overlook.
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Old 12-30-2016, 05:01 PM   #2
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I'm thinking that maybe the fact that you have 40psi air in the system is holding the inlet back flow preventer shut and preventing you from introducing AF unless you exceed this pressure.

Maybe try bleeding the air off by opening a tap, and then trying again to use the hand pump to introduce the AF?


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Old 12-30-2016, 05:20 PM   #3
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Most people add the AF by disconnecting the pipe from the fresh water tank to the 12v pump and using the pump to push the AF through the system. Some trailers have a winterizing kit in that spot, but others add one from Camco.
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Old 12-31-2016, 08:59 AM   #4
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If you pumped air through the city inlet to clear all the plumbing, there's no water left in the valve. Don't sweat it.
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