Bulkhead Gasket - inside or outside?

[parkinsn]

here is a little more for you WET SIDE

[Myka]

Thanks guys!! Now he owes me a case of beer! Woohoo!

[banditpowdercoat]

like xtreme said, the FLANGE side. Which, depending how you put the bulkhead in, will be wether it's the wet or dry side.
If you put it on the nut side, the nut will deform and twist it all up, and it won't seal

[xtreme]

Originally Posted by banditpowdercoat

If you put it on the nut side, the nut will deform and twist it all up, and it won't seal

And the water could seep through the threads and out. Thats why you need the flat surface to seal against.

[banditpowdercoat]

Originally Posted by xtreme

And the water could seep through the threads and out. Thats why you need the flat surface to seal against.

Ya, what he said LOL

[intarsiabox]

I would still go after the case of beer as the nut is usually on the out side for access. It can be a little diffucult to tighten when its at the bottom of a 2 foot deep overflow.

[i have crabs]

always wet side flange or nut

[mark]

always flange side, wet or dry. Just think about it.

[banditpowdercoat]

Originally Posted by i have crabs

always wet side flange or nut

NO


If you put it on the nut, the nut will bunch up the seal and it WILL LEAK.

And, if you have the style bulkheads like I used from Wendell on my 150g, the nuts have "teeth" which would totally make a mess of the seal

[Navarchus]

Always flange side, wet or dry, but the ideal is on the wet side.

Small tip: I always put a thin layer of silicon around the edges of the hole and only then assemble the bulkhead. After that I put a second layer of silicon around the bulkhead (in side and outside) for extra safety