Tank Plug fits Firestone V and VI, Challenger and Super Challenger models.
Liquid Plugs are manufactured with a smooth finish on the surface of the plugs base.
Solving troublesome leaks may require measures beyond replacing a poppet or an o-ring. Occasionally, plugs on well-used Firestone kegs become damaged beyond further use and need to be exchanged for new versions. Typical damage warranting a new tank plug assembly involves the lip above the o-ring having become dented or scratched beyond functionality.