[dbruce222@gmail.com]

How long does it take to get to 2-5 gallons? If its from the fresh water system you will hear the pump come on every now and then to repressurize the system. If not from the supply side, try putting some dye in some water and dumping down each drain. you could use two different colors for supply and drain.

Thanks. I will give it a try. Pumps don't come on so I it is not from the supply side.
By chance have you had any experience with leaking port lights or as I call them port hole windows. I have one that is leaking very badly from the back