Hayward s244t sand filter..
Last season I had small bits of leaf material,etc that would not filter out thru the sand filter. I cleaned the filter twice with the method recommended here. Got lots of small bits to come out with the over flow,but still had bits returning to the pool at a rate that would clog my small filter on the Polaris 165 vacuum. I'm guessing the laterals may be cracked/broken allowing this to happen. Filter is 6 years old but has new multiport valve as of last year. Would lateral replacement cure this or possibly the whole lateral assembly with main tube also replaced???