Originally Posted by Lee67
Yes, pick out the old one with a long nappy pin, then using a small flat blade screwdriver, push the new Oring down the hole, and proceed to carefully push the Oring into the bottom thread....once done a few times it gets easier...off top of my head it's a 7x2 ? HTH
Thanks for your reply.
I thought it may have been a strip down job on the empty cylinder, I dont know why the seal has broken up because the cylinder is a custom quick fill and remains in place.