280g Inwall

[Delphinus]

Originally Posted by StirCrazy

you know tony. the whole gasket on the water side isn't nessasarly true, the gasket has to stay on the originaly intended side or you get leakage through the threds.. what I did when i put a bulkhead in backwards was leave the gasket on the outside then I put a smear of silicone on both sides of the glass and gasket. the silicone wasn't realy to seal it, but rather to prevent anything from getting lose. I did do a test befor the silicone was applied and gasket on the outside worked. if you look at it you'll see why. you have the two faces, the bulkhead flat, and the glass creating a perfect seal.. if you have the gasket on the nutside it gets twisted and deformed as you put the bulkhead in, and will leak a good chunk of the time as the threads are not sealed.

Steve

Thanks Steve, good explanation or at least it makes sense to me when I stop to think about it. The gasket was definitely pretty unhappy under the threadnut. I'll try it again with the gasket on the outside.

I've never really liked threadnuts on the inside, they get caked up with feather dusters and calcium deposits and the whole bit and if/when you try to remove the bulkhead it's always harder than it has to be because of it. I'd rather keep the bulkhead with the threads on the outside but it might push the pipe out too far and push the skimmer out, 1" further out and that stupid effluent pipe won't reach unless I cut it and elongate it. Although I wonder if I could just make the skimmer stand a little higher and have the pipe clear under it and call it a day on that one.