The macerator pump sewer hose system is located in the water service bay of the recreational vehicle and identified by a square box.  Inside the square box used to house the system you will find a macerator pump.  The pump requires 12-Volt power to operate and draws 15 amps while in use.  The fuse for the pump is located in different locations, depending on specific floor plan models. 

The macerator pump sewer hose is collapsible and can extend up to 21-feet.  Fully extend the hose on occasion and wipe it clean to remove dirt and debris.  The hose is designed only to handle normal waste and toilet paper especially made for RV holding tanks.  Wet wipes, paper towels and feminine products can clog the system.

You must remove the drip cap from the end of the hose prior to dumping the tanks.  In the event you start the procedure and then realize you forgot to remove the drip cap, turn the pump off and wait at least 60 seconds to allow pressure inside the hose to dissipate.  Next, slowly unscrew the cap to allow any lingering air pressure to disperse.

The end cap may become displaced, or accidentally fall into a drain.  Add some spare end caps, available at most hardware stores, to your on-board parts supply.   Never leave the system unattended while emptying the tank.  The pump is not designed to automatically stop and allowing the system to run dry may damage the pump.

To operate the macerator sewer hose system, follow this step-by-step procedure. 

1. Confirm that the valve to the black tank is in the closed position.
2. Assure all clamps are tight.
3. Cover your hands with rubber gloves.
4. Remove the drip cap from the macerator hose.
5. Pull the hose out to the required length.
6. Insert the hose into the ground drain and twist into place for air tightness.
7. Open the black tank drain valve handle.
8. Engage the pump by pressing the Sanicon switch.
9. When finished, close the black tank valve and replace the drip cap on the end of the hose.

Some macerator sewer hose systems may include a gray water by-pass, identified by the small clear plastic hose attached to the side of the pump.  This will allow you to discharge water from the gray holding tank around the pump and out the hose to the sewer.  Fabric strings from towels and rugs can clog the macerator pump.  If the system in your motor home has a gray water bypass and you operate an onboard washer/dryer, clean out the pump two times each year.  Remove power to the pump, disconnect the hose end and remove strings using needle nose pliers.