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Overflow thread size

1177 Views 0 Replies 1 Participant Last post by  mcfish
Decided to plumb a 220 with Marineland overflows today. I thought that the threaded male fittings were 1.25 inches, purchased a female fitting from a hardware store and this new fitting can only take 2 threads before it gets very tight. Did Marineland put a metric fitting on their overflows? As it is a weekend I will have to wait for Monday to ask Marineland. Any knowledge would be appreciated.
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