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 > I can’t be the only one with a poorly designed black tank.

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enblethen

Moses Lake, WA

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Posted: 10/28/23 06:12pm Link  |  Quote  |  Print  |  Notify Moderator

Air gap
If you fighting an odor problem, locate air gaps and replace them.


Bud
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dougrainer

Carrolton, Texas

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Posted: 10/29/23 08:46am Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Air gap
If you fighting an odor problem, locate air gaps and replace them.


Air gaps are Gray tank problems. That is why he needs to do the procedures I outlined earlier. Doug

SJ-Chris

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Posted: 10/29/23 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

Something that could help... If possible, install a flush (or Tornado flush) such that it runs along that shelf blasting everything away. Or if that's not possible, a Tornado flush that is pointed right towards the shelf to hopefully do some blasting of that shelf area. This would be useful only when you dump, but at least it gets "the shelf" clean/empty (hopefully) each time you dump so that you are starting from scratch rather than having it build up.

Here is a link to an easy, and inexpensive, install:
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/30315748.cfm

Note: This is different than simply "filling" your black waste tank (with perhaps your built in flush connection) and doing another flush. The Tornado flush actually sprays the water in the direction of your choosing (in this case, along the shelf or at the shelf). If nothing else, it also takes the place of having to stick "the wand" down the toilet (...which requires running a hose into your RV and playing around with the wand in the toilet inside the RV, and then having to carefully get it all back out of the RV which is all very painful).

Good luck!
Chris


San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs

SJ-Chris

San Jose, Ca

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Posted: 10/29/23 12:28pm Link  |  Quote  |  Print  |  Notify Moderator

One other thing that could be helpful...

Maybe if every time before you do a #2 in the toilet you first do a quick 3 second flush to send water down into your black tank and therefore onto the shelf. Then, maybe when you flush your business shortly afterwards it will drop down into the main part of your waste tank because maybe that shelf will already be wet and a little slipperier. Just a thought.

-Chris

enblethen

Moses Lake, WA

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Posted: 10/29/23 12:58pm Link  |  Quote  |  Print  |  Notify Moderator

It is difficult to determine where an odor is coming from. Grey tanks can smell as bad as black tanks.

Ro"n"Joe

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Posted: 10/29/23 05:26pm Link  |  Quote  |  Print  |  Notify Moderator

Try using Unique RV Digest It which should dissolve the pyramids.


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dhull

Some Lake Somewhere

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Posted: 10/30/23 04:18pm Link  |  Quote  |  Print  |  Notify Moderator

Here's what we do to get around developing the dreaded ^ at the bottom of the chute in our TC. Having experienced it several times, once had to take a stick to it and once was able to shake the camper and it went on down.
Take a dish tub about 12x15x6 and fill it with water then pour it down the throat of the commode. Empty the tub as fast as you can. The volume of water hitting the solids moves it along. We do this every 2 days. Simply flushing extra toilet water down doesn't work nor does pouring it out of a gallon jug.

PsnRebel

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Posted: 11/03/23 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

dhull wrote:

Here's what we do to get around developing the dreaded ^ at the bottom of the chute in our TC. Having experienced it several times, once had to take a stick to it and once was able to shake the camper and it went on down.
Take a dish tub about 12x15x6 and fill it with water then pour it down the throat of the commode. Empty the tub as fast as you can. The volume of water hitting the solids moves it along. We do this every 2 days. Simply flushing extra toilet water down doesn't work nor does pouring it out of a gallon jug.


Thanks for all the suggestions.

This may be a solution.

I did a quick search on amazon and found there’s an “rv plunger.” Basically a stick with a rigid propeller type thing on the end to help move things along. Found it cheaper directly from the mfg. just received it yesterday. So I’ll give that a whirl. Literally.

I may still install a “tornado” type device near where the pyramid is forming. That will definitely help when having city water pressure. I was really hoping a suggestion would appear with a direct stream type black tank flush, that would give some “significant” pressure when hooked up to the rigs water line (to help solve the boondocking issue).

I replaced the faucet valves with the shower style hose end with two washing machine ball valves and connected a washing machine mixer hose, basically a “y” styled hose. I connected a short garden hose (2’) with a black tank flush (camco?) fitting to see what kind of result id get. Not real happy with the pressure or water stream it produced. I didnt install it for the test, just “bench” tested it into the grass.

Hitting the highway in a week, hopefully the “rv plunger” will assist in breaking down the pyramid and get things moving.

I think ill check the vent pipe if i have time before leaving, in order to rule that out as being an issue.

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