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Old 11-30-2014, 06:08 PM   #1
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Composting toilets in 5.0?

I've been looking through posts trying to see if anyone has tried to put a Nature's Head composting toilet in 5.0 TA. Wondering if it's possible (before looking dumb on a build/dream sheet)...
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Old 11-30-2014, 06:17 PM   #2
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What's the benefit?
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Old 11-30-2014, 06:23 PM   #3
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As has been said better elsewhere: no black tank to muck with, and presumably I'll be able to stay out boondocking longer. As always, YMMV.
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Old 11-30-2014, 06:45 PM   #4
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Composting toilets have been discussed at length over on FGRV. My recall is that they require power and that the composting action takes a long time to complete.
I think they might work in a cabin, but would be a PIA in a trailer.
You'd still have a black tank ( the toilet holding tank ).
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Old 11-30-2014, 06:56 PM   #5
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Three words come to mind from what I remember reading the thread on FiberglassRV. Big, heavy and expensive.
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Old 11-30-2014, 10:27 PM   #6
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Ah! I forgot to look at FGRV.

Yes, expensive: the online price for the white one with "spider" handle is $925. But I just loved the Gone with the Wynns video series on their experiences! It didn't sound big to me: 20 inches tall, 17 3/4 inches front to rear, and 13 inches wide at the base. (The toilet is 16 1/4 inches wide at the seat.) No black tank to empty; liquid tank is 2.2 gal, solids fit in a medium-sized garbage bag. The Wynns converted their black tank to grey (another video).
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Old 11-30-2014, 10:52 PM   #7
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I am also considering getting a composting toilet for my 15A when the time comes.

There are newer generation composting toilets that are much smaller and less costly than the old gigantic, heavy Sunmar models that you may be familiar with. They don't generally require electricity to run. They are cheaper than the older models too...the Nature's Head and Air Head will run about $1000; the C-Head is more like $500.
Nature's Head Composting Toilets: Saving Our Water for Tomorrow
https://www.airheadtoilet.com/
C-Head portable composting toilet system

The general idea of all these newer designs is that you purposely separate the solids from the liquids. The liquids go in a separate container that is emptied as needed. The solids go in their own bin that contains peat moss or coir (coconut husks) and is mixed to create a non-smelly product that only needs to be emptied after months of use.

The old giant Sunmar designs had everything mixed together and required electricity to run a fan to evaporate off all the liquid. When you deliberately separate the liquids from the solids, that is not necessary.

These newer types of composting toilets are highly thought of by folks in the boating world. There, they eliminate the need for holding tanks, blowers, and through-hull fittings. I figure there are similar benefits in an RV application: no holding tank, no dragging the trailer somewhere to drain the tank, less water needed when boondocking as the need to flush is eliminated.

Here's a short video on the use and benefits of a composting toilet installed in a Class A motorhome --
The Winns talk about a computer fan to help with evaporation and odor control, but that feature is optional.

As far as fitting in the 5.0, that is of course a question for the folks at Escape. In my case, I'm planning to put the toilet in the driver's side front dinette seat. I'm leaning towards the C-Head which requires 18 inches of height clearance -- the dinette seats in a 15A would need to be raised a couple of inches to accommodate that height. Since that area is not fiberglassed, I'm thinking that is a change that Reace could do strictly with the cabinetry and floor level there.

That way, I preserve two sleeping/dining areas, keep the front window, but still have a place to 'go' when I need it.
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Old 11-30-2014, 11:44 PM   #8
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Can anyone explain what happened on our last camping trip . We were in San Diego after we hooked up sewer gas was in whole trailer . Also could smell outside from ground near sewer connection . They did move us . Our black tank was empty as was the grey tank . Never in all our camping had this happen before. Any ideas ? It was very bad .m
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Old 11-30-2014, 11:52 PM   #9
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There was one time we lost the water in the trap in the bathroom, which meant we got grey water stink in the trailer until we figured it out and poured a little water down the drain. A well-stewed grey water tank could be mistaken for sewer smell, but if your grey was empty that's not too likely.

When you hooked up, did you leave the grey and blank dump valves open? That could be a problem -- you could have been getting smells from the park's whole sewer system, though again you'd need to lose the water out of one of your traps. Normally you leave the dump valves closed and only open them to empty your tanks as needed.
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Old 11-30-2014, 11:55 PM   #10
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Were you connected to sewer and had gates open?
If your tanks were empty, and if the p-traps had nothing in them and you had opened the gates, that would allow gases to enter the trailer.
You should not open the gates until your tanks are almost full. That prevents solids from settling in the bottom of the tank.
I can't explain why there was a problem with that site, but you can avoid all sorts of problems by only dumping when tanks are full.
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