Directory: Catalog > Water
Heaters > A.O. Smith >
Old A.O. Smith Water Part Number Cross Reference
Repair parts are listed in sequential order in the left column below by their previous part numbers. If you do not know the part
number you need, please find the model number of your unit in the right column.
All old AO Smith part numbers on our site now go to the new eight-digit part numbers beginning with 100. We have also kept the Top 250 Old AO Smith Part Numbers as active pages on our site, or go back to the master AO Smith Parts List.