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Old 08-15-2019, 05:29 PM   #1
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Just thinking out loud....

Ok, after a few sips from my sippy cup last night i got to thinking, what if i took out the toilet, somehow seal the plumbing into the black tank and used a simple "waterless toilet"(please humor me here), Why do you ask?, well, no particular reason, if anything, only to delete having to dump the black tank AND expand gray tank capacity?....

This is what i was thinking, after deleting the throne and capping of the inlet to the black tank, could i simply add another T handle valve at the outlet (where both tanks drain at)keep that closed and open the other valves(black and grey tank valves)there by making 1 large gray water tank?.

I would think that the gray water flowing into and out of the gray tank and up the plumbing would "equalize" the tank levels?.....

My only real question here is if the plumbing that ties the tanks together would be able to take the pressure, although i don't think an extra foot or two of plumbing would matter?, i don't know.

What do you all think?....

All input is welcome, remember, I'm just thinking out loud......

Please and thank you.

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Old 08-15-2019, 05:43 PM   #2
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Are you talking about a composting toilet?

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Old 08-15-2019, 05:48 PM   #3
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waterless toilets at the VA use a chemical, vice flush water and still get the #1 fluid to help wash it down
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Old 08-15-2019, 06:08 PM   #4
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Old 08-15-2019, 06:11 PM   #5
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Basically a composting toilet. Already done.
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Old 08-15-2019, 06:54 PM   #6
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Was thinking more like the Laveo dry flush toilet.

My coach is a 2000 model, whether i sell or keep for a while, i expect to lose out on sale value anyway and, I'm sure if i did this, i could reverse it at any point.

The real question is whether the drain plumbing would handle the extra pressure.

I like the idea of a composting toilet but, i have read that those also have their issues and there is a certain level of installation plumbing that has to be done, a true waterless toilet you just pull out the bag and replace it.

Remember, I'm just thinking out loud here, entertain the thought but please, don't wrack your head on it either.

Have the people who have replaced it with a composting toilet put the black tank to good use?.....and if so, how?.....

Thank You.
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Old 08-15-2019, 06:58 PM   #7
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Let's think about this....One way you have to put a hose on a twist lock and pull a handle. The other way you have to smell an outhouse until it is full enough that you get the joy of opening it and removing the contents by hand and cleaning any residual. Did I mention it smells really bad? You pick, and remember you will be eating in close proximity to it.

But yeah, the plumbing part of it would work fine.
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Old 08-15-2019, 07:18 PM   #8
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What was in the "sippy cup" ? Better lay off that stuff.
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Old 08-15-2019, 07:29 PM   #9
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Check out the Wynn's youtube videos. they did this and said it turned out pretty well.
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Old 08-15-2019, 08:34 PM   #10
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I would rather store the stuff in the black tank than in the coach, but that is just me...
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Old 08-15-2019, 09:05 PM   #11
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595 bucks? Holy crap!
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Old 08-15-2019, 09:47 PM   #12
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Not sure, but me thinks someone has been at the Wacky Tobaccy of late. Most happy campers I've met want that 'material' as far away from living spaces as is conceivable.
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Old 08-15-2019, 10:02 PM   #13
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I have 3 waste tanks
1 50 gallon black
1 50 gallon grey (shower/bathroom sink)
1 28 gallon galley (kitchen sink)

All 3 tanks have individual dump valves and go to a common drain header
I installed another dump valve on the horizontal run of that common header.

With it CLOSED:
I can open black and grey for 100 gallons of waste capacity
I can open both grey/galley for 78 gallons of waste capacity
I can open black/grey/galley for 128 gallons of waste capacity
I can leave all closed and use each to their capacity

AND I did't have to get rid of my toilet .............doesn't cost me anything extra.......don't have to 'handle' waste bags then carry them thru my rig.......don't have to buy/store waste kit and trash bags to place it in.

I just hook up my sewer hose (that would still be needed for grey tanks) and pull some levers on dump valves.

Just do NOT see the benefit of the Dry Toilet

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Old 08-15-2019, 10:05 PM   #14
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Originally Posted by Arch Hoagland View Post
What was in the "sippy cup" ? Better lay off that stuff.
Note the OP's screen name. Seems fitting enough?

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