Bulkhead Gasket - inside or outside?

[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

[Canadian]

One more for flange side regardless of whether it's wet or dry.

[intarsiabox]

Originally Posted by 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

I do this to. A little silicon is better than a lot of water on the floor.