The PetSafe instructions received with unit said to place "black filter facing pump." The Drinkwell replacement filters said the water should flow through the filter's polyester side first and exit out the black side. So, which is it?
PETSAFE RESPONSE: We do apologize about the confusion! For these refills, the filters are tapered on one end.The tapered end should be inserted first with the white side of the filter facing towards the back of the fountain. If you still need assistance, please contact our Customer Care Center at 1-800-732-2677.