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I bought the same pump from eBay about three years ago. It still works fine I just spray some silicone in it when I'm done pumping. I used it at my last house on occasion to pump my tanks but the rise was only about two feet. At my new house I used it as we were working on the house for 6 weeks and I pumped it out once a week and it was about 10 feet uphill. It took about 5 minutes for the black tank and 5 minutes for the gray tank. I did use a dedicated hose. It's not a permanent setup up so I would connect and disconnect it each time. When the gray tank was empty, I would kink the hose disconnect it from the macerator and then drag it higher than the other end and then let gravity drain the hose as I coiled it up.
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