But when you use silicone sealant you can't re-tighten the bulkhead once the silicone is cured.
So what happens if it's not tight enough to start with? Or starts to leak a week later? Your method works for you, but the next guy may not do it the same as you and end up with a difficult fix.
IMHO silicone on bulkheads is messy and not necessary.
Just wet the gasket before installing to ensure it doesn't bind during tightening.
Hand tight, then a quarter turn and you're done.
And if it ever needs to come apart later on there's no grief.
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