Interesting Black Tank Phenomenon

[Walaby]

Noticed on my most recent trip that when my black tank is almost full, the tank kinda 'burps', when I flush it. It only happens when it is nearly full.

Nice little advanced warning that I need to dump. Happened twice on this trip, and both times, I was within 4 or 5 short flushes of being full.

Mike

[Dave_H_M]

Walaby wrote:
Wow... Didn't think about that. Thanks for the tip on that. I'll check it out when I get home.

Hope it's not moving, but thinking about it, the lower end being submerged would explain it.

Mike

If it has always been that way I would relax.

If the stinky stuff gets to the level of the inlet pipe and covers it, the burp is the only thing that can happen as you temporarily reduce the air volume in the dump pipe.

[Walaby]

Learn something new every trip!

Mike

[B_O__Plenty]

Old-Biscuit wrote:

Earl E wrote:
When full-timing, many of us used the burp to know when to empty the tank. It worked great on our fiver. Not so great on our current pull trailer. For some reason the tank will get to smelling before it burps.

YEP ^^^^^^^

Toilet burps......time to dump
Sink/shower draining slower then normal.....time to dump
Water pump goes 'burrrruuuup'.....need more fresh water/should have added some sooner

I haven't looked at those unreliable gauges in years. My trailer tells what is needed..

B.O.

[Old-Biscuit]

Earl E wrote:
When full-timing, many of us used the burp to know when to empty the tank. It worked great on our fiver. Not so great on our current pull trailer. For some reason the tank will get to smelling before it burps.

YEP ^^^^^^^

Toilet burps......time to dump
Sink/shower draining slower then normal.....time to dump
Water pump goes 'burrrruuuup'.....need more fresh water/should have added some sooner

[Walaby]

Yeah, this is my first extended stay trip (12 days) and I don't think I've been full before.

Mike

[Earl_E]

When full-timing, many of us used the burp to know when to empty the tank. It worked great on our fiver. Not so great on our current pull trailer. For some reason the tank will get to smelling before it burps.

[Walaby]

Wow... Didn't think about that. Thanks for the tip on that. I'll check it out when I get home.

Hope it's not moving, but thinking about it, the lower end being submerged would explain it.

Mike

[gbopp]

coolmom42 wrote:
Probably means the lower end of your vent pipe is submerged. But a good warning!

X2, you may want to make sure your vent pipe isn't slipping down into the tank.
If it's not moving, you have a good early warning system

[coolmom42]

Probably means the lower end of your vent pipe is submerged. But a good warning!