thanks for the input... from some research i've read that the slip ones, when glued, seal much better than threaded...... so what i think im gonna do is just add a male threaded piece below the bulkhead so i can easily take it appart.... and it wont leak (because its not under pressure and water will wont be pushing up against the threading)
and on top im just going to slip my stand pipe in (no need for a 100% seal)
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