I have the portable Flojet and use it to pump into the home sewage system when we come home from dry camping. I pump it probably 3 or 4 feet to the top of the clean-out. I like the ability to flush the system. One caution if you have the hose connected and fresh water on, do not shut the gate valves with pump turn off.
They also make a permanent unit much lie the sureflow pictured above.
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This post is opinion based on experience.
2015 Hurricane 27K
2013 Sea Ray 220SD
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