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Old 09-25-2011, 10:47 PM   #121
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Taking an idea from the grey water recycling projects has anyone ever seen or thought of modifying their water system so that grey water is used to flush the toilet instead of wasting fresh clean water for it ?
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Old 09-26-2011, 01:42 AM   #122
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i like ur idea. the flush water would have to be separated from the fresh water. could be done with a couple of backflow presenters (on the fresh) at the toilet to keep the gray out of the fresh. u would also want a check to prevent fresh from going into the gray inadvertently.

it could be done and done legally but it would take some thought. I believe i would take a sample of it and put it in the toilet (for a day) and see if there is a noticeable smell before i spent any money trying it.

my last trailer, when i filled the grey and it came up into the tub, it was surprisingly unpleasant. it had only one gray tank.
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Old 09-26-2011, 06:14 AM   #123
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Flushing the toilet (black) with gray water is a great water saving idea. The gray water would have been discharged without further utility, but flushing with it would reuse it and thereby save fresh water that would have been used. It would also reduce the rate at which the gray tank filled up to capacity.
Perhaps a Forest River rep will read this thread and be an industry leader in this regard.
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Old 09-26-2011, 07:08 AM   #124
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I'd think you'd have to filter the grey to use it as flush water. Wouldn't it eventually clog the lines running to the toilet?
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Old 09-26-2011, 08:16 AM   #125
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I think you would be affecting the size of the tanks quite a bit but sounds good. The black water tank might need to increase in size, seems all waste water would end up there sooner or later.

I am thinking you would NOT have to cross link the flush water to the potable water, separate pump and a separate fill to add fresh water to the grey tank to give you flush water until or when there was no grey water.

Maybe there would be a small component in the system that filtered and treated the water to address Jim's concerns.
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Taking an idea from the grey water recycling projects has anyone ever seen or thought of modifying their water system so that grey water is used to flush the toilet instead of wasting fresh clean water for it ?
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Old 09-26-2011, 08:22 AM   #126
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I think when we all camp, we are ever so conscious of our water supply, fresh and dirty.
I know that I am always thinking 3 steps ahead and everything is planned so as to use as little fresh as possible and also not fill up the waste tanks too fast.
I find this carries over into our daily life at home and we are more wary about our water use than ever.
Using some gray water as toilet flush water would be a great mod!
Perhaps the water draining out from the shower and bathroom sink would be the easiest to use as far a location goes, as kitchen sink water as mentioned before would have too much food particles and grease in it and would clog the lines.
Even a small accessory tank perhaps under the sink, collecting bathroom water, with it's own pump and manually engaged valves for opening or closing the tank depending upon it's supply and demand, could be used.
I am curious to see what some of you more 'technically advanced' people can add to this possibility.
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Old 09-26-2011, 09:42 AM   #127
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could use two different flush valves and make the tie in on the toilet side. that way as far as ur fresh supply, it would be any different than flushing the way we do now. the toilet would have be designed to do this sense opening the valve to the toilet also opens the water in. i'd still use the backflow presenters in the fresh line just before the toilet flush valve.
i believe if i had to add a filter (activated charcoal...maybe?), that would be the deal breaker for me. it would still be in the back of my mind that one week/yr when i haul one tank to the dump each day except the first and last...
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Old 09-26-2011, 10:57 AM   #128
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Using some gray water as toilet flush water would be a great mod!

snip

I am curious to see what some of you more 'technically advanced' people can add to this possibility.
Mine is almost too complicated. I use a dish pan and carry the water into the bathroom to flush down the toilet.

My tanks are 30gl FW, 30gl GW and 30gl BW so I actually do this to extend my stays. Like most, we don't fill the black tank very fast.

Wish they gave an option when ordering to change to 35gl FW, 35gl GW and 20gl BW.
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Old 09-26-2011, 12:09 PM   #129
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Like most, we don't fill the black tank very fast.

Wish they gave an option when ordering to change to 35gl FW, 35gl GW and 20gl BW.
I couple of camping trips ago we had filled up the grey tank by the last evening, and the black tank hadn't hit 1/3 yet. (And no- I didn't dump it on the ground, I took a Rubbermain bin, filled that, and then brought it into the trailer and dumped it down the toilet.)

So that got me thinking about water pressure and another solution. I cleaned out my black tank at home, and then filled my grey tank with water. I then made sure the drain cap was in place, and opened the grey valve to fill the cavity between the vavle and the drain cap. Then I opened my black valve, and sure enough- the pressure from the grey tank pushed water into the black tank. As soon as I heard the flow of water slowing down I shut the black valve first; and then the grey valve.

The black tank was now reading water in it, and the grey tank had dropped from full to 1/3. In my system that means about 15 gallons of grey made it into the black tank. Yes, there is still about a litre of water left near the drain cap, but once again a small container could be used to collect that to be dumped down the toilet.

So before anybody tries this with real waste, I would try it with clean water as I did. The other thing with the discussion of mods; I think it would be a lot easier to create a mod that allows the middle of the grey tank to drain into the top of the black. Once again the water pressure of a full grey should push enough water into the black to make a difference.
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Old 09-26-2011, 01:03 PM   #130
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Good ideas. Adding something like this would help...



As for connecting the gray and black tanks, you would have to figure in the issue of the water flowing up from the gray (because the pipe is in the middle of the tank) to the black (with the pipe at the top of the tank).
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Old 09-26-2011, 01:17 PM   #131
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As for connecting the gray and black tanks, you would have to figure in the issue of the water flowing up from the gray (because the pipe is in the middle of the tank) to the black (with the pipe at the top of the tank).
Well you would only use it when the grey tank is full; so there would be the weight of the water to push it up. Keeping in mind the height of the tanks; the water only needs to flow a couple of inches against gravity, and if 15 gallons is moving that is 120 pounds of water to start the flow. After the flow starts I am thinking syphon action kicks in for the rest.
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Old 09-26-2011, 01:19 PM   #132
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Then I opened my black valve, and sure enough- the pressure from the grey tank pushed water into the black tank. As soon as I heard the flow of water slowing down I shut the black valve first; and then the grey valve.

The black tank was now reading water in it, and the grey tank had dropped from full to 1/3.
Nice idea=]

Since we mostly camp for extended weekends of approx 4 nights, we never have enough in the BW to dump, always have lots of FW left over, and I end up wasting FW by using it to get the BW to at least 2/3 so we can dump.
If what you are suggesting is foolproof :P I will be doing this from now on.
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Old 09-26-2011, 01:35 PM   #133
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Well you would only use it when the grey tank is full; so there would be the weight of the water to push it up. Keeping in mind the height of the tanks; the water only needs to flow a couple of inches against gravity, and if 15 gallons is moving that is 120 pounds of water to start the flow. After the flow starts I am thinking syphon action kicks in for the rest.
Ah, makes sense.
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Old 09-26-2011, 01:44 PM   #134
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[I][COLOR=slategray]THE ORIGINAL THREAD WAS A

IT IS NEVER A MATTER OF PERSONAL OPINION IF WE SHOULD DUMP GREY ONTO CAMPSITES OR NOT. THE CAMPGROUND RULES DICTATE THAT IT SHOULD NOT BE DONE.
AGAIN: It depends on what campsites you use. In the U.S., with your huge population I can see your problem. Up here in the back sticks of Canada, we do not have a population problem, 90% of government campsites, not close to big cities, are vastly under used. There are no sani-dumps available at these sites to get rid of the grey water. When the black tank fills up, then you start using the out houses. (open pits in the ground with a smelly shed over it). They do not want grey water dumped into the outhouse pits as it washes the sides out of the pit and the out house collapses into the pit.
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Old 09-26-2011, 06:47 PM   #135
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almost 15 pages! Did this push it over the edge? Oh come on lets reiterate it some more!!
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Old 09-26-2011, 07:15 PM   #136
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It's not a matter of having more gray water pressure to push the black water back, and using those valves would have nothing to do with it.
We all now flush with the foot pedal and either city water through a clean supply line OR..... fresh water from the fresh water tank using the pump.

All you'd have to do is put in an separate pump; a "toilet only pump" as it were, and put the pick up tube into the gray tank.

This way if you're on city water it works as normal. If there's no city water, you turn the pump on (only this time it would be the "toilet only pump") and you'd flush as if you were using the regular pump except it will be the new/separate pump and be pumping gray water instead of fresh water.

No mixing, no cross contamination concerns with the fresh tank, no worries, and your consumption of fresh water would be reduced because you won't be using any for flushing. And your gray won't fill up as fast because part of it will end up in the black tank (which won't fill up any faster because you won't be flushing any more than usual).
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Old 09-26-2011, 08:30 PM   #137
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Hey baldy, I think they have somehow turned this thread. Think we may make 15 pages!
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Old 09-26-2011, 08:34 PM   #138
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dumping tank water regardless of color is worng if you did it in the wrong place..

However here is another one for you and the reason why I now carry a small bottle of bleach.
In the last 2 campgrounds I've witnessed 4 people, 2 elderly people, 2 mid 30's washing out their sewer hoses by using ... the drinking water spiggit at the utility poles.

Then people like you and i come along the next day and hook our white drinking water hose to the same spiggit to the water outlet thinking it safe to do so

Now their washing the crapper hose at the tap was not with a grey hose for dirty water like mine at 25 feet in length but directly onto the tap.

Its why we don't drink the water in Campgrounds
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Old 09-26-2011, 08:50 PM   #139
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Hey baldy, I think they have somehow turned this thread.
Thank God !!!
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Old 09-26-2011, 09:13 PM   #140
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AGREED, but you don't have to shout it. LOL

I gotta laugh when someone says, "it is just soapy water." Gotta ask why does the water have soap in it? To release the oils, grease, dirt, good and bad germs, dead skin cells, hair, and crud from what you are soaking in that water, maybe. normally oil and water do not mix, the addition of soap allows oils to disperse in water and be rinsed away. That supposedly innocent soapy mix is loaded pathogens that can multiple and make others sick.

If you would not clean your counter tops with this soapy grey water crud why would you place it where others could come into contact with it. Especially kids.
This is a little off topic but:
When I was a kid we never had the likes of hand sanatizer and if you didn't wash your hands every two seconds that was OK. You look at things now-a-days and every time you touch something you have to run and wash your hands???? This in its own bad way has made the human body unable to fight off any bacteria that it comes in contact with and society as a whole is only making this worse. Do you go out and get the flu shot every year???? "I don't", simply because I would like to know that my body can take care of itself if it comes in contact with anything bad. Never have I went and got the flu shot and never have I been sick with the flu. If the body always has to depend on a flu like drug to keep it safe what will happen to it that one time that it doesn't get that drug?? I know that this is way off topic of grey water but when I read about germs and viruses it just makes me laugh thinking back to when I grew up compared to now. Guess what, you know the old saying "a little bit of dirt never killed anyone". Just keep going and getting those needles stuck in your arms and you will be OK. Regards: Dr. Shabby!!!!!!!!
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