I'm working with a community darkroom that has way more tanks than sealing rings (gaskets). The tanks are all of the universal type, and have the sealing ring with the inverted "L" cross section. I've internetted this at length, but can't find replacements. I'm trying to help economize as much as possible, and hate to chunk good tanks for want of the simplest component.
Anyone know of a source for these?
Anyone know of a source for these?