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Opinions appreciated: check valve vs anti-siphon holes in overflow returns
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04-08-2012, 05:30 PM
bignose
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Join Date: May 2008
Location: Edmonton
Posts: 943
Everything that myka said makes sense. I don't use check valves on my system but I drilled holes in my returns and I make sure that they are cleaned every so often to prevent plugging.
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