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Old 01-31-2016, 08:15 PM   #1
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low point drain and winterizer

I was just wondering, if by draining the water from pipes using low point drain ensure that there are no water at all in the pipes, what is the point of pumping in anti freeze into the pipes ?
if there is no water in the pipe, then there wouldn't be water freeze inside the pipe that can break the pipe, would there ?
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Old 01-31-2016, 08:27 PM   #2
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Not a good practice since the water lines could have low spots that don't drain and freeze. Usually the pex lines will survive, but the fittings usually don't.

Antifreeze is cheap insurance. If done correctly usually 2 gals will be enough.
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Old 01-31-2016, 08:33 PM   #3
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Some Anti-freeze is cheap Insurance

I think the major reason is you never can get ALL the water out by draining, most but not 100%. Therefore antifreeze helps condition and push out the remaining water in low pipe areas i.e. bends, exterior shower pipes, exterior kitchen faucets, sink "P" traps, the bottom of tanks, valves, the water pump, etc.
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Old 01-31-2016, 08:47 PM   #4
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Blowing out the lines with air pressure also helps
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Old 01-31-2016, 09:02 PM   #5
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Thanks I forgot pipes and hose can have low spots. So is the valves
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Old 01-31-2016, 10:20 PM   #6
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Don't assume ANYTHING !!! You didn't build it, someone who gets to go home after the trailer is done did it.
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Old 02-01-2016, 11:28 AM   #7
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I always blow the lines out with air after draining from the low point drains. It makes adding antifreeze a bit faster. You would be surprised at how much additional water comes out when air is applied. I drain the gray tank into a 5 gallon bucket after using the air and nearly fill the bucket.
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