I fitted my stage 3 DNA filters last night.

The cone filter replaces the original and is held down by the plate with 4 screws that replaces the original with the snorkel removed. The panel filter goes on the left hand side covered by the metal plate replacing the grey plastic pannel. That's all find and dandy.

Only question, the small round thing. Does it 'plug' into the top of the new cone filter as I have done in the picture below?

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