Thread: ATO reversed flow
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  #5  
Old 01-30-2018, 03:41 AM
hfp75 hfp75 is offline
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Join Date: Sep 2011
Location: calgary ab
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It’s a back siphon....

I had it happen one time, overnight it drained 1/2 a 65g tank... I quickly acted and saved it all, but lesson learnt......

Not again....
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