Quote:
Originally Posted by gauthig
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In my old Jamboree, sinks went to grey and toilets went to black. You always flushed for a few seconds to get water in.
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All design involves compromise one way or another. There is no perfect solution.
This type of operation, while simpler and more straight forward, adds extra water to total tank capacity. And if dry camping that extra flushing water will deplete the fresh water tank sooner too, so it would have to be larger as well.
Maybe on some very large motorhomes extra tank capacity and associated weight isn't as big a deal, whereas smaller and lighter motorhomes may benefit more from higher water utilization efficiency. In my opinion there is no one correct answer.