Pump o-ring size

[Billyjack]

I have searched and can’t seem to find the info anywhere so does anyone happen to know what size o-ring goes on the cover of a danner mag 3? Thanks

 

[Reeferdood]

http://www.pondmasterservice.com/-R...or-Pond-Mag-Model-2-3-250gph-350gph_p_88.html

 

[JasonK84]

Also found this for measuring a broken o ring to find out the size.

Maybe useful to someone looking at this thread:
http://nerfhaven.com/forums/topic/27640-replacing-brokenripped-o-rings/