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Sure Dave. In this instance, the return out of the (wretched Hayward EC-65 perflex) filter (2-3 feet above the ground) was running horizontal out, 90 down to 7" above ground, 90 horizontal, (no check valve in horizontal run), inline Pentair Rainbow and then 90 down straight into underground to...

ATTENTION: For anyone reading this thread, the above is certainly not true. Due to experience, I know for a fact that without a (YES) restrictive check valve (or a plumbed in P-trap) to separate your in-line chlorine dispenser from your filter and/or multi-port valve, WHEN the lines drain out...