Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Thanks for the advice. I think you’re correct, it goes between the glass and the boiler flange. However, the new replacement glass seems to be considerably thicker than the original glass, so with the rubber gasket in place, the retaining bolts aren’t long enough. Long story short, I installed it without the rubber gasket and it seems to run fine with no leaks.