Originally Posted by creativepart

Rather than the expense and trouble of adding a BWF system to your existing tank I suggest that you get an adapter that you connect to your main sewer dump. You attack the adapter between the sewer dump and your 3" dump hose. Then you attach a garden hose used only for flushing.

The adapter has a gate valve between the adapter and your dump hose. You close that gate valve and turn on the garden hose. Water under pressure flows back up and into your tank - and you can use it on