how do macerator pumps work
1 Attach macerator pump to your RVâs sewer drain point. 2  Attach exit hose to the pump. 3  Run hose to an open sewer connection or into a toilet, etc. 4  Connect the pump to your 12V battery. 5  Pull your tank drain valve. 6  Turn on the pump. 7  Run it until the flow stops.  Turn the pump off.