Went on maiden trip with our new KZ Spree 329 IK. We were in full hook up site. On departure our black tank was 3/4 and grey tanks 3/4 full. I've RVed for a number of years (being our 3rd RV) and think I know how to properly dump. Opened black tank valve dumped great, then closed valve when empty, opened grey dumped fine and closed valve. Proceeded to hook up factory installed black tank flush system. Opened black tank valve and turned on water hose to flush line.
Wife immediately yelled there in bad sewer odor in our travel trailer. I tunrned off water to black tank flush and went inside and boy it was a horrible smell. Confirmed on panel all tanks read empty too.
No leaks anywhere, no evidence of any problems, but highly unsusual for the smell to be so pronounced when using the factory installed flush.
