Sea Ray

Thank you Big Mike Any brand you recommend?

Dometic PML 500

Dometic PML 500

Thank you

Just a little further input and information. Air is entering the system so it could be the pump or something allowing air to enter but I would suspect that if the leak was from the pump there would be a spray of water from the high pressure side or a continuous problem if it was entering from the suction side. You might even see bubbles in the discharge water.
The a/c Vane pumps are not good at priming nor holding back the water when stationary so maybe a simple down loop in the outlet side of the pump might stop the water draining back to the ocean when the unit is off or cycles off.

And with water leaks on floors - Make sure to fix is asap. Continuous leaks = damage and mould. Is it from the a/c drain pan? Check slime and build up in the drain hose and make sure that there isn't a loop - it should drain easily.

Just a suggestion do you have a pan under the A/C. On my 310 I had a crack in the pan where the hose fitting attached to the pan. I would find water in the cabin bilge. I couldn’t replace it without taking the the whole A/C unit out. I mixed up some marine Tex epoxy and patched the crack. No more leak. No more water.

Thank you seabuz. I found the new check value to be leaking still. I changed to a Jabsco CV and it stopped the leak.