563. New o-ring will not stay on the pump union tailpiece.

The new pump union o-rings are new and universal, and they have not been installed on any unions. Therefore they may pop out of the grove when initially installed. If this happens, have the o-ing stretched out and leave it there for about 2 minutes. Try placing the o-ring on the outside part of the pump union tailpiece and let it sit there. Then remove the o-ring and place it into the groove of the pump union tailpiece. It should sit in place. Try this out and let us know how it goes.