AC Water line flushing
Posted: November 16th, 2025, 1:43 pm
I am going to guess, if you are reading this, you have had to flush your AC water lines at least once in you boats life. My home Port is in Lake Erie near Sandusky OH and am here to tell you myself and my fellow Carver neighbor have to flush our AC lines at least 2 times a summer as it clogs up with silt from the water. So much so that to make things easier for myself, i have installed quick connect flush ports on the manifold to make things quicker and easer for me. All while our other neighboring boaters with different manufactured boats (Cruiser, Sea Ray, Meridian) never have an issue... like EVER.
So my question to the brilliant group. Has anyone found a fix to this ongoing issue. No other manufacturer seems to have this issue as bad as Carver owners do. I have to assume its 1 of 3 things:
1) the water lines they use allow buildup and other manufactures use a different water line. (I believe this is unlikely)
2) the routing of the water lines have too many bends and those big turns allow buildup.
3) they try to save money by installing 1 pump for 3 systems and between the manifold and distances they have to go, they simply cannot get enough flow/pressure to keep the lines clear.
I would love to get all of your thoughts. My carver 396 runs:
1 1000gph pump
1 6000btu unit (Fwd)
1 16000BTU unit (Mid)
1 9000 BTU unit (Aft)
The mid and aft are the most common issues with blockages.
So my question to the brilliant group. Has anyone found a fix to this ongoing issue. No other manufacturer seems to have this issue as bad as Carver owners do. I have to assume its 1 of 3 things:
1) the water lines they use allow buildup and other manufactures use a different water line. (I believe this is unlikely)
2) the routing of the water lines have too many bends and those big turns allow buildup.
3) they try to save money by installing 1 pump for 3 systems and between the manifold and distances they have to go, they simply cannot get enough flow/pressure to keep the lines clear.
I would love to get all of your thoughts. My carver 396 runs:
1 1000gph pump
1 6000btu unit (Fwd)
1 16000BTU unit (Mid)
1 9000 BTU unit (Aft)
The mid and aft are the most common issues with blockages.