Ken Powers SV Aquarius <ken@...>
On Aquarius, we also have this problem with our 24V D60. We continually see an increase in the ppm each year. I have a few questions so we might flush this out...
1) Do you have a pre-pump that feeds your high pressure pump?
2) For those that have a pre-pump, do you see this problem?
I am starting to get the feeling that cavitation do to air in the system is causing the problem on Aquarius. We only have a single sea water intake, stock Amel, and we do make water while motor sailing, and this could cause air to get into the water-maker system. With the air in the system I am led to believe this is like a jack hammer on the membranes causing micro tears to form. Overtime, the holes get bigger, and whaalaa 1000 ppm.
I don't have the pre-pump on Aquarius, but I am planing to add the pump when I install new membranes in about 6 months.
Does anyone have any thoughts about this?
Aboard Aquarius Locked Down in Phuket