Composting toilet and more fresh water? - Page 2 - Fiberglass RV


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Old 03-08-2015, 08:11 PM   #15
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The gray tank is 35 gallons.

No manufacturer offers a composting toilet as an option that I know of. They are all retro fits. I can't imagine it's something they would want to provide, since improper operation would lead to rather messy warranty claims.
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Old 03-09-2015, 07:34 AM   #16
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The OP wants to remove the black tank and add a second 24 gallon fresh water tank. What part does the grey tank play?


But it doesn't appear that he even has the Oliver yet ?????
I'm thinking that once you use the extra fresh water, it will need a place to go? I know a lot of people run the grey water on the ground whether it is legal or not and this contributes to areas being restricted from boondocking. They did this in the parking lot of one of the Tucson Wal-Marts which was among the first to close their parking lot to boondocking. Not saying that OP or anyone else here would do it but it is done and worse. Too often I see commercial campgrounds blamed for boondocking locations being closed but that is not always the case. It wasn't only the grey water they were dumping either.

One needs to realize that a composting toilet has limits also. I read on them extensively at one time and anyone considering them should do that. It is funny though that people say they don't smell and they say that about black tanks also. The temperature and humidity have a lot to do with "smell" so it can differ and you can get accustomed to smells. Two of my uncles had farms with cattle, dairy farms - they didn't notice the smell. We sure noticed the smell.
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Old 03-09-2015, 08:20 AM   #17
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"Where to put it" is an exceptionally good point. I wonder if the op had considered that problem. Thanks for the clarification.


FWIW: When I bought my house about 14 years ago there was still a chicken/egg operation down wind from me. The chickens weren't bad, but on hot days the huge piles of droppings were. When asked about it, the owner responded with "What Smell?"
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Old 03-09-2015, 09:18 AM   #18
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I watched the wynns video and they said there was no smell.
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Old 03-09-2015, 09:28 AM   #19
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Ya... but being "Green" seems to trump costs and all other sensible counter excuses.
If this was a biggie, where is the list of trailer builders offering it, even as an option?
I love to try new things and learn Bob.
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Old 03-09-2015, 03:48 PM   #20
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Much misunderstanding on how things operate. Nature's Head, Airhead Toilet and C-Head are all urine diverting toilets such that the solid waste is what is composting. Since they divert liquid waste, this makes them much different than the older style composting toilets, Clivus or Sun-Mar.

Your typical RV toilet system has a flush valve that flushes into a vented blackwater tank. When the toilet flush valve is closed and the blackwater tank valve is closed the only fume escape path is through the vent pipe. The Nature's Head toilet is also a vented sealed system. The Nature's Head trap door (flush valve) is similar to what is used on porta potty. With a 12v exhaust fan installed in the vent line and turned on when the trap door is opened the composting area will be under a slight negative air pressure exhausting fumes from the composting area.

To my knowledge the most extensively engineered production travel trailer is from the Australian manufacturer Kimberley Karavan and it is a fiberglass rv. They are available for import into the US delivered to Los Angeles however I would guess they are costly, more than an Air Stream. The Kimberley Kruiser (off-road full size caravan) does offer three toilet options, one of which is the Nature's Head. Their discussion and comparison of the toilet options advantages and disadvantages is linked below.

Kimberleykruiser - 3 Choices of Advanced Camping Toilet Technologies
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Old 03-09-2015, 04:04 PM   #21
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Quote:
Originally Posted by Bob Miller View Post
The OP wants to remove the black tank and add a second 24 gallon fresh water tank. What part does the grey tank play?


But it doesn't appear that he even has the Oliver yet ?????
And if memory serves me correctly, the fresh water, gray water, and black water tank in an Oliver is all one piece; that is, one big single tank which has walls separating each of the products. And it is sandwiched between the floor (inner fiberglass shell) and the outer fiberglass shell. The OP needs to contact Oliver if he is thinking of going that route.
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Old 03-09-2015, 05:16 PM   #22
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CPW, you're correct that the tanks are all sandwiched between the inner and outer hulls, however, they are three separate tanks. Grey on one side of the trailer, fresh on the other. Black is under the toilet.
Sherry
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Old 03-09-2015, 06:39 PM   #23
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Sherry,
Are you sure that it is not one piece in the new larger Oliver? When I toured the factory, it sure looked like a single tank to me in the trailer that had just started construction.


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Old 03-09-2015, 08:54 PM   #24
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In this thread, post #2, I mentioned that I'm not having Oliver install a Nature's Head toilet on my unit due to the venting issue.

The blog "Gone with the Wynns" did point out that having a composting toilet installed allow them to make use of their now unused black water tank to increase the size of their grey water holding capacity. They did this by plugging the top blackwater tank connection (where the old toilet connected) and by adding a new 3inch dump valve where the 3inch flexible sewer hose connected. By leaving the new dump valve closed and opening both grey and black water valves, the grey water level can equalize across both tanks.

Crazy Easy Way To Combine RV Black and Grey Tank
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Old 03-10-2015, 10:44 AM   #25
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I wish I had more floor space to install a composter in my ParkLiner.... I need to cut a cardboard box to the size and put it in and see how I would feel standing in there to shower....I guess i could have a seat to shower on lol. I think it's a great idea and with my solar panel on the roof it would keep the batteries topped off for the small amp draw of the exhaust fan.
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