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I'm in the Baltimore, MD area and have a '75 Newport 28 with a freshwater tank that is not pressurized. The faucets and toilet have a pump handle on them to draw water from the tank. The faucet in the galley is broken, and doesn't draw water any more, though the water is right there in the line just below the faucet. The faucet and toilet in the head are OK.
In my case, would it be better to just disconnect the lines from the faucets and the toilet, and use a shop-vac to blow the water completely out of the system and drain it out via the bilge pump? Then I could leave the system completely empty for the winter, and shock it with bleach and refill in the spring.
I'd disconnect the top of the kitchen sink hose, and leave it tied up... the water will drain back down into the tank. Drain the tank as much as possible. Then, I would winterize the tank with non-toxic (pink) antifreeze... and pump it through to the head and head sink. Don't forget to pump out the holding tank and put some anti-freeze in the holding tank too. If you have a pump out system for the holding tank... you should pump some antifreeze through that too.
Good point... marine heads should never be plumbed directly to the freshwater system...regardless of whether they're pressurized or not. My head draws water from the head sink, via a diverter valve in the sink drain line. Makes winterizing the head pretty simple.
After executing this process for the head, I plan to pump out, throw some fresh water in and pump out again, fill the toilet with redpop, pump most of it through, and call it done. Alternatively: I may pump all the redpop through and remove the pump for rebuilding over the winter.
The water tank was never used by the PO, nor by us. I plan to leave it as it is.
Jim
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