Quad DE filter returning DE to pool, missing air relief screen

Mar 30, 2023
24
Austin, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
Hi all! First time taking over a pool, I took apart the filter and there is a lot of DE everywhere, and also no screen on the air relief tube. I’ve been having DE blow back into the pool since the last cleaning (done by a company - and not super happy with them so I’m trying to learn how to do it on my own).

Questions..
1. Do I need to replace/add the screen mesh cap on the center tube, and if so, where do I find that?
2. Does anything look otherwise abnormal in the filter? It was cleaned 4-5 months ago.

Additional info:
18,000 gallon pool, not salt, filters cleaned every six months, filters last replaced in Aug 2022 (and company is now trying to pressure me into buying new filters).

Thank you!!!
 

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