CPR Bak Pak 2 O Ring Size

[firstlight10]

I need to purchase a new o-ring for the collection cup on my CPR Bak Pak 2 skimmer, unfortunately I don't have a CPR dealer nearby so I will try to acquire one from a local plumbing supply place. Does anybody know the diameter and thickness?

 

[gveng]

the "o-ring" in the CPR bak pak skimmers really doesn't do anything besides let you adjust the height of the collection cup. for this application anything would work, some people use rubber bans, but i used one of those yellow Lance Armstong bracelets. works like a charm!