Last trip my fresh water pump failed and we had to use jugs of water to flush with. That is one of the benefits of RV toilets. Since I was the 2nd owner, Arterra Dist. or WFCO would not cover the pump under warranty as stated in their instructions. That is unfortunate as the pump was only used for about 9 months. After going back and forth with Arterra several times, I ordered another pump which should be here in a week or so. In the mean time, with to much curiosity and spare time
, I decided to see what failed in the pump. It seems that the brushes have never made proper contact with the commutator as shown in the pic. Only about 1/4 to 1/3 of the brushes were making contact and causing the motor to fail. When it failed I noticed that the motor housing was to hot to handle. The Artis pumps seem to be quite common in RV's and marine use, so hopefully the defective one I had is just a Fri. or Mon. ass'y and not a common QC problem with these pumps.