It is. I’m wondering if the original gasket that it came with that I cut is inside the hole causing the new gasket to take that shape. Wondering if I somehow cut that out if it would make a difference.Is that bulkhead cemented in? It would only be a few bucks to have tap plastics cut a washer out of acrylic. And O shape or if that BH is cemented, a C shape to add material. They usually have a scrap piece that’s cheap and will cut a template you draw. Making a washer would increase the flange size of the bulkhead. The gasket between the wash and tank. Have a look into shadow overflows it’s a similar concept with the pass through of a gasket with three surface plates.
im interested in the washer idea. Would I get two “C” shaped discs and simply slide them between the gasket and the flange or would I need to weld it to the flange?
By the way, thanks for walking me through this.