Hello,
We recently purchased a property with an inground pool. I need to replace the backwash handle but I cannot identify the exact model. The installer didn't mark which filter it is, it's either and EC-65 or EC-75. I also need to know excatly how much DE to put in the filter. The serial number is 340K28, and next to the serial number stamp it's labeled EC-1230. Pictures:
Thank you!