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"O-ring" for standard size check valves, made by NBR , new and slightly thicker than the original.
This O-ring serves as a secure seal without tightening the check valve.
Therefore, it can be used with a shallow blade, current check valve wrench or large flathead drler bar without force.
It can be removed without licking the grooves. Thats why its a ring.
Furthermore, please do not tighten it up when you wear it, and stop it at a moderate level.
It will flatten or break if too tight.
Recent Check Valve & Air Stems come standard but not old
Would you like to use it as an old or a replacement that was too tight and squished?
[Compatible with older models]
Lantern 200 series, 242B and later, 220 228D and later, 234 243 247 249 236 237 635 639 etc.
Lamp 139, 152, 153, 154, etc.
Stove 500, 501, 501A, 502, 508, 413, 425, 426 series, 442, 443, etc.
Compatible with Current Models.
Lantern 282 285 286 288 200B 214 290 295 635B 639B-C
Single Burner 508 508A 502 533
Two Burner 413H 414 425 424