Replacing the Macerator Impeller

A replacement impeller kit for SHURflo macerator pump is available on Amazon: SHURflo 9457100 Macerator Impeller Kit

Optional:

• The original macerator discharge hose is a 1-inch ID Kanaflex hose. You can get on EBay by the foot, just click on the link.
• Macerator pump replacement: Shurflo Macerator

Step-by-step procedures:

Before starting, make sure that the house battery is off or disconnected. Clean and empty both holding tanks. Some waste fluid is expected to drip when you start disconnecting the macerator inlet and outlet ports, so be prepared. I used a small bucket to catch all the remaining waste fluids in the line.

1. Raise the passenger wheels on ramps for easy access to underside of the RV. I made wooden ramps for this purpose. For safety, chock the driver side wheels to prevent the RV from rolling off the ramps. 

Adding a Wireless Remote Control to the Macerator

Dumping the holding tanks with Roadtrek macerator system is pretty easy and quick, although the switch location which activates the macerator pump is not very ideal. The switch is located on the frame of the driver seat facing the driver side door. To operate the macerator you have to open the driver side door and reach for the red switch, and since it is momentary switch you have to hold the switch the entire dumping process. It is a minor inconvenience, but leaving the driver side door open while dumping the holding tanks is an open invitation for flies/ bugs to get in the RV not to mention when it is raining...I thought, there could be a better solution.

At first I thought of replacing the momentary switch with an on/off rocker switch, but someone could accidentally flip the switch on and run the macerator dry causing early macerator failure. RT used a momentary switch there for a reason.

My solution is a wireless on/off momentary switch. Again I decided to go with a momentary switch on the wireless controller as for the above reason.  The wireless controller and remote transmit/receives analog signals which is prone to radio wave interferences that could inadvertently activate the controller. Although I am using a separate switch to power the wireless controller, there is always a chance of forgetting to turn it off.

Macerator Emergency Extension Hose

 

I always keep a macerator hose extension on hand in case the sewer connection required extra reach. Although it is uncommon for campgrounds to place sewer connections far back from camp sites, I have seen it on occasions.

The Thetford Sanicon 21-ft Retracting Hose is ideal for extending the reach of your macerator hose; it is also available in a shorter 10-foot version. The 28-footer costs around $81 and the 10-footer costs around $38. I made my own extension using a Flexible PVC flat hose with a Polyester sleeve, similar to a fireman's hose, for a more compact and less expensive alternative.

Motorized City Fresh Water Tank Fill Valve with Automatic Fresh Water Pump Control

Like many Roadtrek RV models, the RT Agile has two options in getting their fresh water tank filled, either via gravity fill port located on passenger side door B-pillar or via the city water hookup. I mostly use the city water connection just because it is on the same side where the macerator dump is, and most dump stations/ campgrounds are set up this way. 

Filling the fresh water tank via city water hookup involves few steps and this mod drastically shortens those steps. To fill the fresh water tank, all I have to do now is flip a switch then hookup the city water…and that’s it. No more walking around the RV, opening the sliding door, reaching and manually opening the fill valve, then doing same process in reverse once the tank gets full.