In ground pool with Pentair skimmer box, side port plumbed for suction side pool cleaner. The skimmer is plumbed with rear port being pump suction and front being pipe to main drain. Before pump intake I have a Jandy valve to balance/select amount of suction from pool cleaner and skimmer/main drain.
AnywayI had an equalizer years ago in the skimmer the type that has the sliding gate valve to open close the main drain water access.
Anyway I have lost the equalizer.... Should I replace this.... pool store owner says I should not hare or use one? Without the equalizer I would estimate that I am not drawing any water from main drain. Is this right? Is this good, bad, or does not matter??