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Old 05-07-2016, 01:47 PM   #1
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Winterizing water line behind city water inlet

How do you get antifreeze into the water line behind the city water inlet, without causing the o-ring to come off the plunger in the city water inlet check valve?

I use the trailer water pump to winterize. I manually depress the check valve plunger to get antifreeze into the line. Last year I must've had to much pressure in the line when I did this because the o-ring came off.
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Old 05-07-2016, 02:43 PM   #2
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Why not just use a fitting that screws into the water inlet and use a compressor to blow the water out?

http://www.amazon.com/Camco-36143-Br...air+connection
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Old 05-07-2016, 04:16 PM   #3
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There is a cheap hand pump made just for that purpose. You can also use it to make sure that a tank flusher is protected.
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Old 05-08-2016, 10:07 AM   #4
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BFlinn181

I had a rv store winterize the first time (in 2012). They didn't use an air compressor. The water was pushed out by the antifreeze. I could buy a fitting and compressor, but the last 3 years I've done it myself the way the rv store did and haven't had a problem.
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Old 05-08-2016, 10:45 AM   #5
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Since you're only talking about one short section of water line, if you buy the fitting you could use a bicycle tire pump to push the water out of that short section of water line. Or, you could buy the pump lynnmor suggested, although he didn't provide a link. Another idea would be to hook a beer bong up to a short section of garden hose and pour the antifreeze in the water inlet, then after a careful rinsing, you'd have a recreational toy for campfires.
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Old 05-08-2016, 12:29 PM   #6
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Quote:
Originally Posted by tombucz View Post
How do you get antifreeze into the water line behind the city water inlet, without causing the o-ring to come off the plunger in the city water inlet check valve?

I use the trailer water pump to winterize. I manually depress the check valve plunger to get antifreeze into the line. Last year I must've had to much pressure in the line when I did this because the o-ring came off.
The water pump causes too much pressure, so turn it off and open a faucet to release the pressure.
Then push the valve open at the inlet and have a helper click on the waterpump.
Works every time and I don't blow out the o-ring anymore.
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Old 05-08-2016, 02:58 PM   #7
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Originally Posted by BFlinn181 View Post
Since you're only talking about one short section of water line, if you buy the fitting you could use a bicycle tire pump to push the water out of that short section of water line. Or, you could buy the pump lynnmor suggested, although he didn't provide a link. Another idea would be to hook a beer bong up to a short section of garden hose and pour the antifreeze in the water inlet, then after a careful rinsing, you'd have a recreational toy for campfires.
Link that I should have supplied: Plastic Winterizing Hand Pump Kit - Camco 36003 - Winterizing - Camping World
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Old 10-06-2016, 10:29 AM   #8
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The water pump causes too much pressure, so turn it off and open a faucet to release the pressure.
Then push the valve open at the inlet and have a helper click on the waterpump.
Works every time and I don't blow out the o-ring anymore.
I did it the way you suggested and it worked like a charm. Thanks.
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