Disconnecting Pressure Pot

Hi all, would appreciate some help with a technical question please. My pressure pot is working fine but my compressor is outside in the shed and it is really cold out there right now. I want to get the pot to the desired pressure and then bring it inside to ensure the resin cures at the correct temps. As soon as I disconnect the air hose, air starts leaking from that connector and I slowly lose pressure. Can I add a little valve to prevent this or is it not meant to work like this?