Lebon wrote:Guys can this o-ring be replaced with the filler valve body in place, or should I remove the filler valve body from the cylinder ??
You don't need to take filling valve body off, unscrew fill valve and refit with 0-ring seal over threads, when you screw it back it will sit in recess of fill valve body. You might find that there is already an 0-ring there, take it out. Rog