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

I changed out my gasket & doubled up Weeden seals for some O-Rings I got off Amazon today.  They are 3mmx10mmx3.5mm Nitrile Rubber O-Rings.  I also bought 4mmx10mmx3.5mm but 4mm ID was too big and leaked as soon as I put water into the tank.  I also meant to get Fluorine, since it has a higher heat tolerance but the Nitrile appear to be doing well after two steam tests.

I have a spare Bing sight glass that came off a 10/120, its glass OD measures out to be 4mm and this candlestick measures out at 3.5mm.  I do like the fit on my spare a lot better but these are doing just fine on the 3.5mm sight glass on this candlestick.  Though if any if these Bing Sight Glass' come under a 3.5 OD then they would likely leak.

Now I can put my Weeden seals back into the parts drawer!

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