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If the pump fails to prime, which of these does not need to be checked?

  1. Filter system pressure is too high

  2. Gasket or seal on the pump lid

  3. Water level in the pool

  4. Blockages in the suction line

The correct answer is: Filter system pressure is too high

If the pump fails to prime, the other options listed (B, C, and D) are all potential causes that should be checked. Option A, filter system pressure being too high, is not a direct cause of the pump not priming.