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Old 02-03-2013, 08:43 PM   #10
Lakepilot
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We have a very similar system and it froze forst year. There are two schools of thought. First is to remove the check valve in the tank at the foot of the uphill pipe. The other is to drill a small hole in it. My father in law had a hole drilled in his when it froze and our check valve was remove, if I remember correctly.
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