OK a call to Perlick (duh should have done that second) and I learned:
425 faucets use 3 O-Rings 1/2" ID and 1/16 CS (Cross Section)
525 faucets us 2 O-Rings 1/2" ID and 1/16 CS (Cross Section) AND (line disconnected)
Hope this helps someone else...
Eric I think so. I'm going up to my local Tru-Value later to look for them.
For the 425 yes all three are the same unit, it's the 525's that have 2 different O-Rings.
I also realize I forgot to put the composition material is... N-7044
Material: O-Ring Composition N-7044 : 70 durometer nitrile, internally lubed with RTD's proprietary organic lubricant
Compound Details: N-7044 70 durometer nitrile, internally lubed with RTD's proprietary organic lubricant
Status: Non-Stock Compound
Colors:
Durometers:
Flags: FDA Internally Lubed
Essentially Buna-N available at bLowes or Dome Hepot or Ace or name it...
O-Ring composition compatible with Beer!
http://www.efunda.com/designstandards/oring/oring_chemical.cfm?SM=none&SC=Beer#mat
and since my faucet sprung another leak this time at the shaft seal... I called Perlick and received the following size information:
Perlick 424SS
Shaft O-Ring: Dash 202
ID 1/4" (.234")
CS 1/8" (.139")
The o-rings are the same on the 400 & 500 series!!
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