Black holding tank won't drain past 2/3
After 4 days of camping we have a full holding tank. I open the black valve and hear a rush of fluids for about 1 min, then nothing. Check the tank level inside and it shows 2/3 full. After searchi...
Forum Discussion
Roundtwo-40 wrote:
It should be noted that most black tank flush (external) hose attachments require the black tank valve to be OPEN during the flushing period. Just an FYI :)
Im curious as to why that is. I have a sticker on the side of my TT that says that.
I must admit though, that I do close it for a minute or two to let it fill up a little to help float away anything that's left behind that might not get rinsed. I know it probably does no good but.....
