I need to replace a lateral or laterals plural. Trouble is, the manual lists two different parts - on for pre-2005 models and one for post-2005 and I don't know which I have. The serial number stamped on the filter doesn't match Hayward's typical 17 digit format (the numbers I know how to decode).
Anyone have any insight into how to decode this serial number : 320L27 (second pic)?
Anyone have any insight into how to decode this serial number : 320L27 (second pic)?