Leaking at screw cap on connector at Poolside

It is a pressure relief valve. Releasing some water is normal if you have a powerful pump. Read

polaris 380 pressure relief valve leaking??


Is your cleaner working normally?

Although I see a crack in the pic that is not normal. You can buy a new one for $20-$40.
 
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When I got home yesterday the suction tubing at the pump was leaking a bit, so I tightened that up, and the Polaris was leaking abnormally high at this connector.

After cleaning out the Polaris netting, the connector leaking slowed down considerably.
 
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