Black Tank Dumping?

[Only_True_Mosno]

I recently traded my Cougar Fiver in on a new Montana 3721RL. When dumping my black and gray tanks on the Cougar it was obvious by the noise they were dumping. When I pulled my Black Tank handle for the first time on the new Montana I hear nothing? Gray Tank..same thing?

Here’s the strange part...

When I checked inside prior to dumping the black and the gray tank both registered 1/3 full. I did leave the black tank handle open when I went back inside and ran some water into the toilet. I went back outside and still nothing. The DW then yelled that the black and gray tanks were now reading zero fill. ?
I never did hear anything going through sewer hose, and the sewer hose didn’t have any residual liquid that I could tell left in it.

Only other thing I should mention is that this was the first camping weekend with the new rig and the temperatures dropped to a low of around 25 degrees overnight. Could this be part of the problem?

[NHIrish]

Sometimes the dump station has better suction than others...ditto on the clear elbow.

[bailer6334]

FYI, its best if you dump your black tank when its 3/4 or full only.
That way you get rid of all the tanks contents and do not have a possibility of any residual buildup to clog the tank.

[bukhrn]

jwandvassie wrote:

Old-Biscuit wrote:
Next time dumping hold end of sewer hose up/out of sewer line and watch

OR better yet buy a clear adapter. Connect it between drain pipe and sewer hose. THEN you can watch the stuff flow.....no doubts and you can also see liquid clear up as you flush/rinse tank

X-4, I can see what's happening, regardless of what those ridiculous gages say.


+1

[BizmarksMom]

jwandvassie wrote:

Old-Biscuit wrote:
Next time dumping hold end of sewer hose up/out of sewer line and watch

OR better yet buy a clear adapter. Connect it between drain pipe and sewer hose. THEN you can watch the stuff flow.....no doubts and you can also see liquid clear up as you flush/rinse tank

+1

+2

I do not always hear it when I dump the tanks. But I sure do see what's going through them.

[Parrothead_Mike]

I also use the clear adapter so I can see what's coming out of the tanks. (Kinda like watching the preverbal "stuff" go down hill.) I would also suggest that, if possible, run water from a hose or maybe even a near-full 5 gallon pail of water down the toilet. If you're still not seeing anything there is a serious problem with the valves. It's not like that has never happened, but quite unlikely.

[Jim2007]

Hi.. Agree with old-biscuit..

[jwandvassie]

Old-Biscuit wrote:
Next time dumping hold end of sewer hose up/out of sewer line and watch

OR better yet buy a clear adapter. Connect it between drain pipe and sewer hose. THEN you can watch the stuff flow.....no doubts and you can also see liquid clear up as you flush/rinse tank

+1

[Dutch_12078]

I don't normally hear much of anything when I dump, but I have a 45° clear elbow at the outlet that lets me see what's going on. Sometimes I can also see the hose bounce around a little when I first pull the handles.

[Old-Biscuit]

Next time dumping hold end of sewer hose up/out of sewer line and watch

OR better yet buy a clear adapter. Connect it between drain pipe and sewer hose. THEN you can watch the stuff flow.....no doubts and you can also see liquid clear up as you flush/rinse tank

[Only_True_Mosno]

Dumping

[downtheroad]

I'm confused (I often am)
Are you asking about "flushing" or about "dumping?" These are entirely different.