Hello all, my Mom has a IG pool with a sand filter (triton T100 I believe it is ). Last week her Hayward cleaner stopped moving as well as it use to, so she took it in and they replace the flappers but stated to her that it showed signs of being used with too much suction (not sure if related). She reinstalled the cleaner with no improvement, notice her pressure was high on her filter so she back washed. The pressure did not drop at all but instead remained at about 22psi. I stopped by last night and she told me of the problem so I tried back washing as again the pressure did not come down at all. It appears to me that the filter has a clog at some point. Where is the best place to start looking?
I read somewhere that there is a chemical cleaning process that can be completed prior to ripping it apart and changing the sand.
Filter appears to be 10+ years old, she has owned the house for 5 and it has never been cleaned to her knowledge. .
I know zip about sand filters so .. Next steps ?