Pick the brand
The brand is printed on the same plate as the model number.
Filters that come up most
The part numbers listed for the most pet fountains in the index. Open one to see every model it fits.

PAC00-13906Fountain filter10 pet fountains
PAC00-13067Fountain filter7 pet fountains
PAC00-16150Fountain filter7 pet fountains
F1 SERIES REPLACEMENT FILTERSFountain filter4 pet fountains
DOCKSTREAM REPLACEMENT FILTERFountain filter2 pet fountains
PAC00-13712Fountain filter2 pet fountains
PAC00-16152Fountain filter2 pet fountains
43745Fountain filter1 pet fountain
44005Fountain filter1 pet fountain
TRITONE PET WATER FOUNTAIN REPLACEMENT FILTERSFountain filter1 pet fountainWhere the model number is
On pet fountains, the plate or sticker sits in one of a few places.
Pet fountains: On the bottom of the fountain base or on the box.