exav8tr, The brand I think you are talking about is Seelevel. Expensive but they do work and you can get them with a switch panel just like the Montana panel, with water heater and pump switches and battery gauge. We use the burp method also but have only had a problem with the galley tank not reading because of grease. We fixed that with a cup of Cascade dishwasher powder in each of three tank fulls. We do the Calgon thing too and that helps and we are really watching the grease when doing dishes and pans... Dave
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