Black tank plugged - Event Date: 08 Sep 2018 - 18 Sep 2018

We've used a reverse flush valve like the Valera and it is a good way to clean the tank.  In fact, I used a wand, ice, and the reverse flush all in a futile effort to clean the crud off the sensors for the tank level monitor.  

Our practice is to try to avoid the use of any tp in the tank.  Visits to the campground latrine are a much better way to avoid accumulation of solid matter, though that's not always possible.  For liquid elimination, it's really not a big deal to put the used tp into a little discrete plastic bag and throw it in the trash.  Obviously, for solid elimination, it gets a little delicate putting the tp into a bag, though in many countries with iffy sewer systems, it's common not to put tp into the toilet.  

Bottom line, using RV tp and limiting the quantities will go a long way to avoiding clogged tank drains.

The Valtera thing looks like the way to go, now that you already have a clog.  I've heard of people trying to avoid any TP in the tank, but, in my opinion, that's nuts!  Why have a camper with a toilet if you're afraid to use it!  (To each his or her own, I'm just saying no TP in the toilet is like, I dunno, no gas in your car because it smells bad.)  Anyway, I've never really had a problem with our black water tank.  I think using more water to flush than you might think necessary and some kind of chemicals will keep you out of trouble.  Extra liquid more than anything is the best thing you can do.  I always try to add as much water to the black tank as possible before heading for the dump station.  Even a short trip in the campground to the dump station will stir things up pretty well.

TT