O-ring sizes for 2" Pentair backwash valve

[miatawnt2b]

Does anyone know what all of the o-ring sizes are for a 2" pentair valve? I want to rebuild mine and the hardware store up the street sells o-rings for peanuts. Figure it's much cheaper than buying a kit.
-J

 

[denniswiseman]

Measure the recess that they fit into and the diameter of the O ring

 

[miatawnt2b]

found a kit on amazon for $6. Pretty good deal IMO. However, when the kit comes, I'll measure the o-rings and post the info for everyone. There's times when a leak is an emergency and it's nice to have the info.