I’m curious to know if anyone has ever emptied their keel holding tank while out at sea on passage? I’ve no idea how to do it since it’s below water line. Is the only way to empty it to pump it out?
Hi mate could you post some pictures ?You would need to install a pump, usually a macerator type. There are a number of ways to plumb it. I installed a tee in bilge in the pipe that goes to the deck pumpout. Then to a macerator pump, then to a y-valve on the discharge seacock in the head, to select between emptying the tank or direct discharge from the head.
Hi Terry,I did something similar. I have a LectraSan behind the toilet in the head. I can discharge overboard there or send it to the tank. I put a large seacock in the wet locker forward of the chart table and a Y valve and a hand pump (feared an electric pump would fail on me). In can pump out on deck or discharge through the seacock.