and probably many other models as well.....happened to me this weekend & couldn't have happened at a worse time!
Last trip of the season we're closing up camp...I'm doing the tank emptying thang, hook up & turn on the black tank flush to give it one last good flush.......10 seconds later I have water gushing out of the bottom of the trailer where the low point drains are. After a quick shut off & some choice words I halted all flushing operations.
So......this eve. after work I decided to look into where this leak is coming from. Long story short...the vacuum break in the flush line failed. Where is it you ask? This is where I want to save ya'll the aggravation I went through finding it...behind the shower control valves...easy access!
Did some research and found out these (plastic) valves made by B&B have a high failure rate & most stores no longer carry them. I was able to find a brass version & ordered one. Not cheap though, $68 + $12 shipping...damn thing better be on my doorstep in the morning!!
Food for thought for anyone looking to "head off" a future problem.