Mine came with it installed and I like having it, makes it super easy to flush. I noticed the sensor light was sticking so I just needed to give the tank a good 10 min flush then the sensor (for tank = empty, 1/3, 1/2, 3/4, full) issue cleared up.
I'm new to RV'ing and to the forum but here's something else to look into. Btw, no intention of taking the original post sideways but this is worth a look if you have not done so already.
It's The Geo Method for cleaning and keeping black tanks clean. Here's a link but there are others on the forum about it.
Geo Method Results?
One of the sr members posted a link to download it here: http://www.forestriverforums.com/for...?do=file&id=88
My concern is liquid bleach on rubber parts like the toilet seal so just be careful.
2003 Dodge Cummings
2015 Rockwood 8289 WS