Anyone ever installed a bulkhead with the flange on the outside?

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Aquarium Advice FINatic
Dec 20, 2005
Warrensburg, IL
Hey All,

I am setting up my new fuge/sump tomarrow and I wanted to install the bulkhead with the flange on the outside of the sump and the nut on the inside of the sump.

Has anyone done this? I don't see why it would make any difference as long as the gasket is between the nut and the sump wall. But I wanted to check and see if it has been done and not leaked?

Thanks all,

Mostly you want the water pressure pushing with the flange to keep it sealed, not fighting against the water pressure. All in all it probably won't make a difference one way or another.

The obvious question that makes the mind spin is....... Why?
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